If you have time, you may want to start off with the breathing exercise I give on my breathing page. That gets the oxygen circulating throughout your body, and gives you a better chance of stretching fully. When you've spent a couple of minutes settling into your stretch, hold your maximum stretch for 30-60 seconds. Wait for a minute or so, and then go back into it again. Repeat the same stretch this way at least five or ten times.
Repetition is the key.
Do not grunt or strain. Don't do anything that makes you grit your teeth. Just go as far as you can, let the music relax you and help you, hold for 60 seconds and then back off. Then start all over again. If you do this every day for at least 15 minutes for each area to be stretched, you'll see amazing results.