be more productive with my time

I get free time and spend it in bed watching rubbish t.v or doing something else, anything else other than the task that needs doing. for example, I have a lesson plan to do except I’m so consumed by my “problems” at the moment that I’m sitting around dwelling on stuff that I have no immediate control over. I could still “dwell” if that’s what it takes but I could get on with my work at the same time. I know what’s going to happen, I’ll rush around like a mad woman trying to get everything done in an hour before it’s all due, then it won’t be good enough, then I’ll be annoyed with myself for not being more productive earlier on. I could be achieving so much more than this!