Write for 15 minutes a day

I don't know why, but I have this desire to establish a daily habit of writing for at least 15 minutes a day. Perhaps, this comes from a desire to learn to write better? Or perhaps I'm simply just bored and writing is a way to fill that boredom? At any rate I'm going to try to write daily, I don't believe I will be able to write daily, but if I am able to do this 2-3 times a week than I'm hoping to see progress in how well I develop my thoughts. I see the biggest hurdle to this habit is figuring out what I want to write about. Pick a topic that I can develop ideas around. That's all I have to write for now, be back tomorrow...