I would do 500iu of HCG every day for 10 days as Mr.X said. alternatively you can do 1000iu every other day for the same period with about the same results. I wouldn't take much bigger shots than 1000iu's (as some will suggest). There is reported to be risk of permanently desensitizing the leydig cells doing that, which would be really bad. No point in taking any unnecessary risk there. The slin pin shots are real easy.
How much HCG to do depends on your cycle. If it was a short mild cycle and your testicles haven't shrunk very noticeably, then 5000 iu's is probably enough. It it was a long cycle, or of your testicles are noticeably reduced, then you might need 10,000iu's. Some people who have really done themselves in with excessive dosages for too long may need even more HCG, or multiple treatments.
Opinions vary as to when to take HCG. I think pretty much anything will work, more or less. I like to take HCG during the period after my last shot when the long esters are being eliminated from my system, timing it so I take the last shot of HCG right around the time androgen levels are crossing the baseline. That means the last shot of HCG would be sometime around week 3-4 after the last shot of a long ester, such as deca or test enant/cyp. Right around that point (just before the baseline crossing) is also when you would hit it hard with nolva therapy and possibly clomid, trying to recover your natural test production.
Use this site to determine when your declining androgen levels will cross baseline:
http://bulkmuscle.com/pct/index.php
During the time you are taking HCG, and for several days before and after, you will definitely want to be taking (at a minimum) nolva to block estrogen.