Hello Bucky's Room!

Is there anybody here that does icon design? If so, what application(s) do you use? Are there any specific guidelines that you follow?

I am asking because I am interested in getting into icon design. I've been researching on the internet and been trying to apply what I've learned into specifically 16x16 and 32x32 icon design.

I am interested in hearing what other techniques and practices the users here follow.

Some practice work:
/images/forum/upload/2014-08-29/d4c06210303b880492a89d6413122df1.png