OK, example:
Masterdrol: 2 caps 1st week, 3 caps 2nd and 3rd week. After the 3rd week, u should've made some great gains if u fed your muscles correctly with protein. The bottle says to stop the cycle after 3 weeks.
I think u can run it longer, but do what it says just to be safe.
After the 3 week cycle, you'll need to take your natural test booster pills to get your test levels back in check. This runs 3 pills week 1, 2 pills weeks 2 and 3, and 1 pill week 4. done. This is considered off cycle, or PCT, post cycle therapy.
This is the most basic of cycles, but if u wanna get fancy, u can stack Masterdrol with M1P. They give u instructions on how to do it on bulknutrition.com. Also, if u throw in the anti-estrogen E-form while on the cycle you'll be tight, and get the best results possible.