Do your ideas flow out of you naturally, or do they require a lot of conscious effort? After the idea, is it easy to do the drawing? (I don't really know how it happens because I don't do creative work).
Depends on the day and my mood. When I'm feeling energetic and inspired ideas tumble out. When I'm anxious, depressed, or low energy I find I just have to force out an idea about something, about anything. The drawing is usually an emotive follow through on my mental state about the idea. A couple times I've done a drawing before an idea, but I don't like doing that. I often grab photo ref of my face or sit next to a mirror. I can work off the same reference photo and get very different results depending on my mood and what I'm looking to push.











