Clicker training is awesome!
I actually technically just started using an actual clicker. Before, I would just use my voice and say 'yes!' when he did something right. I've found the clicker helps him learn faster what I want him to do... since the sound is way more consistent than a human voice. I bought one at Petsmart a few weeks ago for like .99 cents so it's worth it! lol.
This is all he's learned with the basic method of clicker training at 1.5 years old.
So I really love the positive/clicker training method when it comes to trick training!!