I Need Help Climbing Out Of Bronze (Tips??)

Hello fellow summoners, I have been playing league since the beginning of season 5, and recently dropped from silver 5 to bronze 3 (better than i thought for going 7/3). I have learned a lot since my season 5 placements (like to actually take ranked games seriously...) and I know I have improved a lot. My skill set revolves around laning phase, I very rarely lose lane (0/1, 0/2) and if I do, then I am ahead by a reasonable 20~30 cs. After I win my lane (I understand that winning lane doesn't revolve around kills) I try to make a difference by ganking botlane, one question I have is when the other lane isnt in lane, and their bot lane is pushing, should i go in for a gank, or should I start attacking his tower with the risk of the mia jg and mid laner? One thing I have noticed in bronze is there are more trolls (nunu sup, urgot sup, sona top etc. etc.), but there actually seem to be less players that are disgustingly bad at the game. In silver, there usually is a lane or two that goes 0/4 with 50 cs at 10mins, but in bronze I notice that even though people don't know what to ward, where to ward, when to ward, or when to fight and when not to fight, or when to use the advantage they have, they sometimes know when to freeze and farm under or near tower. Speaking of farming under tower, when i'm winning my lane (but don't have enough pressure to actually kill them) I like to freeze the lane near tower and zone them off of xp and cs, while poking them. I try to do this a little closer to my tower than the enemies, the question I am getting at is... Is there any disadvantage to doing this? I guess thats about it, but if you have any mid/top/adc's that carried you out of bronze feel free to let me know!