When in doubt

 When in doubt, return to the best, most solid and straightforward method. The Seinfeld Chain, keeping a calendar and trying to accumulate long streaks of continuous work, is helpful when you find yourself working very little, only a few times a week or month. I kind of let things slide, being burned out on days when I have both class and meeting, so I began a chain on Sunday.  

You can always experiment with other productivity methods. Some might work, others not. But Seinfeld works and you can always return there.