Drawing stuff from a reference picture can be real hard. Especially if you're trying to do a self portrait. You have all these thoughts on how you look that can really disturb the process of seeing and drawing. A tip is to put the reference upside-down and draw like that.
Here's my first attempt to capture myself. I am semi-pleased with the similarity. But the upside-down thing is really interesting. I think I'll try it some more.
View large here.