[papacuppa]

A lot of good answers but I'll throw mine into the mix. Assuming I know what the ultimate goal is for what I'm currently working on, the day-to-day becomes working towards what I call momentum tasks for the next morning. The start of the day is when I'm at the highest risk of being derailed, so super easy tasks are paramount. So before I wrap up for the day, I'm making sure I'm stopping at a point where I know - and perhaps am excited - to continue the following day. I never stop at an impasse, personally. That means I can sometimes put extra work in, but generally I come up with momentum tasks quite intuitively. I'll write my todo list before going for a 5k run after work [typically ~5pm to reset my brain for relaxing a bit, and often get ideas for how to overcome larger challenges that comes with the concreteness of thinking about momentum tasks. I find self-set constraints really helpful in my productivity. I am generally a pretty boring person, though, so it suits my personality. Just my 2 cents.

[bo1024]

> I'm making sure I'm stopping at a point where I know - and perhaps am excited - to continue the following day. I never stop at an impasse, personally.

This is a very nice trick, and one that's less likely to happen by accident if you set your own hours.