I wish I could give you a more helpful answer to this but I don't even really know how I come up with things most of the time, the ideas sort of just flow into my head spontaneously and it's something I've never had any trouble with. However I find that listening to music and being out in nature are two things that really help to inspire me. I seem to have kind of the opposite problem of you, I think of too many ideas but never have enough time or motivation to draw them all!
Thanks. I do too enjoy music and time in nature, but I never thought of it as a way to let creativity flow into my mind. But your work is amazing and I actually see it all over tumblr and instagram. But I've gotten more inspiration so thanks for your help
Well that's just what works for me, different things are gonna inspire different people and I guess the best advice I could give would be to find whatever that thing is for you, then you'll never run into problems!
Thank you so much, I'm so happy to hear that you enjoy my work and even happier that it could help you with your own art. Hopefully this means you'll be adding to your gallery soon? (: