Need to Focus?

I've been struggling to focus lately so I created the following worksheet. It's for two weeks, I put the starting date in the upper left cell and put a check mark if I feel like I've been productive and an X if I felt like I was slacking.

I've made the time range 15 minutes chunks mostly because if it was a half-an-hour I'd tell myself I've messed up 10 minutes might as well get my 30 minutes worth.

I've noticed this really helps my focus.