If I'm feeling like I can't be bothered, tired, bored or uninspired I check to see what's going on for me. What's taking my energy and where are my priorities at. There's usually something after my attention and creativity.
You have to nurture what's inside of you. Creativity is a bit like a bucket. Once it's been dished out it's pretty hard to create on the reserves leftover.
When I'm feeling really stuck... Like I don't know what's my next move or there isn't an opportunity in sight, I know there's a choice for me to create. As hard as that can be creating stuff keeps me moving forwards. The most creative people aren't the most talented, they're the most consistent and committed to their craft.