Well bro there are two main things you can do. First take a look at a cyclists calves, their awesome. If you can start cycling do it and try to do most of the hard climbs going in a stright line isn't that effective.
Second what has really given me a wicked set of calves has been seated calf raises. When doing these go as heavy as you can without sacrificing form and stretch all the way both up and down you will feel them squeeze and burn like a mother. Also when you do them make sure to have your toes on the plate only, if you put more of the ball of your foot on the foot plate your not going to isolate your calf muscle as much, and also integrate a drop set when doing them. Then when your done do a second exercise going as heavy as you can with high reps, try this for 2 months and you'll get results guarateed.
Good luck bro!