I've never had a lig pop (that I know of, heh), I understand they're quite rare and are a good sign, so you're in good company there.
Like I said, I've been out of the game for awhile and haven't been able to keep up with all the latest and greatest techniques, but here are my recommendations and what has worked for me:
Be sure to do a warm-up. This is important for safety reasons, but it also loosens things up a bit making it easier to get a good stretch. You should also do a warm down after you're done. Typically, I just use a towel and soak part of it in hot water and wrap it around my shaft and base for about 5 or more minutes before and after my sessions, sometimes between the stretching and jelqing parts of my sessions as well.
Increase the duration of your stretching sessions. 10-minutes is good for starting out, but try to slowly increase your duration (don't rush it). Before I slacked off, I was doing 20 to 30 minutes of stretching followed by an equally long, if not longer, wet jelq session (never could get the hang of dry jelqs). I don't think too many people would recommend exceeding these limits anytime soon as you'd be overtraining and risk injury. Plus, it is the intensity that counts (but again, be careful). After you've worked up to these kind've time limits, try to increase the intensity and back off a bit on the duration.
I'd investigate your LOT (search forums for LOT Theory) and go with the recommended stretching angles based on your LOT. The short version is that if you have a high LOT (meaning your erection angle is very high [i.e. pointing upwards]) then you probably have a lot of length to be gained from Ligament stretches by stretching downwards and
between the cheeks (
BTC), etc. If you have a low LOT, you probably don't have much more to be gained via Lig exercises, so you should try high angles and focus on your Tunica stretches.
After you're comfortable with the basic stretches, try to work in some DLD Blasters (search the forums if you don't know about these, there are a number of threads concerning them). I found these to be a huge help with my length gains, but they are definately an advanced exercise so work up to them. If you don't do Kegel exercises right now, I recommend you start so that when you work up to the DLD Blasters, you'll be in good shape as Kegeling is a major part of the Blasters. (Plus, kegeling will increase your erection strength and has other benefits as well -- and they can be done anytime, they don't require privacy).
Once you've gotten beyond this point, try some of the other good exercises on the forums, there are a lot of them and new ones pop up all the time.
Just remember that it takes time, it's not a race, so don't rush it and risk injury.