everybody has to find what works best for them both in training, dieting, anabolic androgenic steroids and PCT - post cycle therapy - . For some it may take 1 cycle to get awesome gains and other a few tries. Some don't do proper PCT or diet correctly and lose a ton of their gains even after 5 cycles. It may take a bunch of cycles to get it right to really understand your own body. Even then as you age and train harder and get bigger your PCT and gear usage will adapt as well. There's no magic formula despite what any anabolic book says.
So being that you just ran Sus250 for 10 weeks, and considering its your 1st cycle, and your young age, I'd say 2500 IU of HCG - human chorionic gonadotropin - should suffice. Spread the dosing out to 200iu e3d until you finish it off. Run it at the end of your cycle. Take some aromasin or light dose nolvadex (20mg ed) to counter any estrogen rebound from the sus since that will be in your system quite a few weeks even after your last shot. Run a OTC PCT for a few months and maintain the protein intake (~200 - 250 grams ed) and you'll be ready to go on another cycle in about 10 weeks.
Next cycle look to finish it off with an oral anabolic like stanozolol or oxandrolone and maybe take a light dose of Arimidex - anastrozole - or aromasin or even mesterolone throughout the cycle if you want to increase the weekly Testosterone dosage. This will keep the bloat down, estro sides at bay, and ultimately make PCT a cinch.