Hi om_namah_shivay,
Okay now I have the book Light on Yoga with me.
congratulations; can easily be a life-changing piece of paper. 
But one thing that I don?t understand is, while writing the courses the author has only mentioned the name of the asanas but didn’t mention the number of sets.
For example, for the first & second week he has prescribed, among other asanas Tadasana, but he didn’t mention how mentioned the number of sets. Does mean that we are suppose to do each asana just once?
Did you follow his course ? What did you do ?
I am following the course, doing so for 16 months, but I am “only” in week 18, which is actually weeks 16-17. Every now and then I do some of the Asanas that are to come next, but I still make progress and weeks 19-21 are somewhat a break, for example no Trikonasanas anymore, and I don’t feel ready for a caesura like that.
However.
I suggest you experiment a lot with the Asanas and find out what’s good for you yourself. I tried all sorts of constellations: Doing each Asana a lot of times, only holding them for a few seconds, getting out, getting back in and so on. I did a whole sequence several times after another, which means: Do the Asana once, briefly, do the whole sequence like that, then repeat the sequence and do so 3 - 4 times. What provided me the greatest insight was actually experimenting and working with each of the Asanas, not actually seeing it as “doing the Asana”, but studying it. This includes gathering all sorts of information from any source available (as I mentioned), I got any book on Asanas from the library, bought some, watched any DVD I could find, bought some too (love anything from Dharma Mittra & Iyengar), I spent hours on the internet, YouTube, etc. etc. I would try different methods of getting in and out, was taking great care to get the alignment right and such. I would easily spend half an hour and more on just dealing with one Asana.
Today I do any Asana in the sequence only once, but I hold them for a relatively long time. I found that this works best for me, but I wouldn’t know if that’s the case for everybody. I’m not a friend of flowish styles (“Viniyasa”), I do Asanas one by one. I will hold a triangle up to five minutes, but it’s not perfectly static, I move a bit when I feel like, bend a knee, straighten it again, take an arm down, move my concentration to different points, etc. etc.
Bottom line: Work with the Asanas yourself. Don’t rely on what people say about them. Just be very care- and mindful so you don’t hurt yourself.
By the way: I have no teacher as well, never had one, no teacher ever saw me doing an Asana. Yet, I never hurt myself, my progress is simply awesome. I’m around 40 years old and literally healed several problems I had before I started, most notably a “bad knee”, that, when I started, made a nasty crackling sound when I just bent the knee. I could kneel for a few seconds with great pain, not stand up without support. Today I kneel for 15 minutes and meditate there, I do squats with my son piggy-back. And a handful of other things. So:
Although I have mentioned in my first post about my history of depression, anxiety & panic attacks, what I deliberately didn’t mention is the fact that I am presently facing severe anxiety disorder. Its even difficult to get out from my house
I can’t maintain eye contact with people.
Because I created this thread to take asana practice to an advance level it felt weird to mention all this.
I don’t want to give up asanas & follow a meditation only routine. Please don’t ask me to do that.
What do you suggest ?
Don’t be influenced by people like InnerAthlete who indeed does suggest that doing something without a personal teacher is totally bad and out of the question. You sensed that right, he does it all the time and then always denys it. He does it even in his denial, it’s hilarious. But he’s a businessman like many others are on forums. You see, this forum has 40,000 unique visitors per month, so many “selfless” teachers drop by to promote their studios and websites and hope to make more cash. Watch this film on the issue:
http://www.snagfilms.com/films/watch/yoga_inc/
Don’t let such people make you nervous, be smart and use your own brain to find things out, it’s your body. Iyengar, for example, had no teacher himself. He would just spend hours and hours practicing and stuyding the Asanas. Do it like him, don’t hand the responsibility for your own body and practice over to some list of certificates. I’m, though, not saying a teacher would be bad. Have one, if you can or want one. Still continue thinking yourself, studying yourself and question anything she/he teaches you. Also: Don’t just listen to my suggestion of Iyengar. It might not be the best thing for you, though I must totally doubt that you won’t make great progress by following the course wholeheartedly. But I’m just some individual too with my personal preferences. Maybe watch this film too:
http://www.tudou.com/programs/view/2L28Ao3LkiU/
On the psychological problems you mention: Depression and anxiety have a cause. Find out that cause, in case you’re not already fully aware of it. That cause causes a conflict, because something about it isn’t resolved. You have to resolve that specific thing and have to come to terms with it. I’m perfectly sure that each and any part of Yoga can be of assistence, for example will great progress in doing Asanas give you confidence and a good feeling about yourself. Mind-related practiceses, like meditation, concentration and breathing, will give you more control over you thoughts and emotions, it will relax your mind and calm it down, which again makes … everything easier. You achieve good things, that makes you feel good and strong. It indeed does make you strong/er, not just feel strong. But in the end it’s those individual causes that you have to deal with, and that you - if you ask me - not do with some people on some forum. I suggest you start talking about these things with people you trust and if you have noone that you can trust, find a therapeut, meet her or him, see if you can trust them, and if you do, work with them. This can be difficult, because you might have to visit a lot of therapists to find one you do trust - it’s quite personal. But don’t think that you just have to perform some posture or mental concentration or breathing technique and those problems will go away. They won’t, they have to be dealt with directly.
Be smart!