I use powder.
The way I apply it is with a little lip brush. It goes on quite dark, but then I take a new mascara brush(You know the ones you can get in a package??) and comb over it until I get it to look the way I want. Then I set it with my powder foundation(But dont use a lot of foundation).
The best advice I have for you is to just play with it. Once night when you have nothing to do, go in the bathroom and play with the look of your eyebrows lol.