Two of my favourite pieces of advice to artists starting out can be found here in these two videos. The first one is a (NSFW) call to do something, do anything, and not get hung up on things that stop artists, especially new artists, from doing anything (”My Favorite Artistic Advice” Tales Of Mere Existence)
A second and related video, Ira Glass on Storytelling, part 3 of 4, is part of a series. I like this one in particular because it deals with a problem you might have: that your taste surpasses your creative ability. Ira has great advice on how to deal with this.
In short, never stop creating. Create alot. Create everyday. Practice. Evaluate. Do some more.