Frankly, I can't advice much. But I know how you feel - when I'm overwhelmed with work (especially if something doesn't go smooth, or I stuck with the problem). Well... I'm just telling myself: "I have to".
And try to arrange time (may be not a lot, just 20-30 mins). Usually when I kick myself out and start brushing etc. I already mentally ready for the ride (and I try to leave behind thinking about work etc.).