Last week I finally got around to completing my inspiration board.
I first sprayed the cork board with Elmer's spray adhesive, and then carefully lined up the fabric before pressing down. This step wasn't necessary, I only did it to keep the fabric from shifting while I stapled it onto the back of the board.
After a little trial and error, I found the best way to keep the upholstery tacks straight and evenly spaced was to line them up along my ruler like this:
I'll post a picture of the finished project once I have my desk done!