Getting familiar with Jayce

My Jayce is about at 70%.  Its passable but not that strong yet.  I've played about 10 games as Jayce and I've realized that I'm going too ham.  I'm bringing all the Hormel with me.  I usually do well early to mid game but when it starts to get towards late game I die more often that I should.  I need to save my hammer form when I can secure the kill and get away.  I just need to watch more diamond Jayce matches and keep on plugging away.