Was working in the Kitchen at a restaurant Saturday and cleaved straight through a few layers of my left (dominant) palm of my hand, luckily didn't hit tendons or any such thing, taken the week off so far because I can't even hold a bar with it, just letting it heal. Considered cauterizing it just so I could keep on working and maybe go to the gym without it splitting back open, but decided to let it come about normally. Luckily because I stay active my immune system is getting at it quicker than it normally would, but still taking time. It's not severe and shouldn't put me out much longer.
I guess I just find things to do outside of the injury, I can't hold a barbell without pain (push nor pull) so 80% of my training staples are already out of the window, and I can't stick to unilaterals on my right side for the obvious imbalances, so I just do some pistol squats and sprints every now and then until it gets better. But then again it's not a back injury and it won't set me out for a considerable amount of time, or interfere with much activities past weightlifting, so I guess I'm not in much of a position to be depressed about it.
I'd find something that won't nag at it, maybe try to get a new rep max for pullups or something, that won't compress it and fuck it up more. Maybe even reconsider dietary options or plan out new training cycles/take a lot of time to look over weaknesses, it'll keep your mind focused in on it and you'll be able to plan out improvements even if you can't physically do all that much, sometimes I take a rest day to do that anyway, but a week or more focusing on the optimum environment for when you jump back in could work wonders.
Also movies, always movies.