Game Animations, Best way?

I’m having serious difficulties on the animation part. I know how to put a FBX aniamtion to a character, but i need a tutortial, or something about creating the animations. All i create is horruble, ugly, and nothing reallistic.
How do you create animations? Any trick or recommendation?

This is not really a scripting question but let’s say you want fast progress with animations you should buy motion capture data