On Wednesday's I post productivity ideas. Here's one.
I measure things throughout the day and then at the end of the week I see where I spent my time, what factors contributed to a productive day, what through me off course and how to correct and move forward.
I have an excel spread sheet with days and categories of things that I am working on on a daily basis. I also have a 'mood' category to measure how I am feeling. That way I can also measure and see where certain triggers come into play and bring about depression and feeling down.
This is a variant of what the author Jim Collins does on a daily basis. It's been helpful and helps me to stay on task and review what is working and what is not.