Creative: Blu magazine cover

I'm back on track for going through the book Creative Workshop, which is one of my New Year's Resolutions. I'm not caught up (yet), but making progress. Today's challenge was to create a magazine cover for a magazine focused around something to do with the color blue. It could be anything. In fact, one of the examples given was a magazine that focused on literature surrounding depression. The image above is my end result.

In evaluating my process after, I've come to the conclusion that I think I rush my idea generation/sketching stages. I spent barely any time doing so, which is something I find myself doing often. If anyone has any tricks for slowing that down, I'd love to hear them.