I just focus on what I am doing after and what I have to look forward too (i.e. a night out, free weekends, gigs, etc etc) I know getting money is great but it'l make you miserable unless you spend some on urself, and if you are doing 12 hour shifts plus odd weekends in a care home I'd say your earning a fair ammount
take the days you do have to recoup (rest relax have fun) or do somin you really want to and enjoy such as a new films a gig, playin football etc
I also find gym helps get over work blues, when I've had a realy tough day I go into the gym and use it as motivation, thinking about how much better it will be when im stronger, healthier, fitter in general lol (its fairly motivating)
Lastly, I dont really like my job most days but when I finish I dance down those stairs, yes dance.. just taking small moments in your day to enjoy somthing simple is key imo to coping with parts of your life you dont really like
So do a little victory dance when you finish (assuming the area is safe to do so lol) raise your fist and shout YES! (assuming your boss isnt right behind you lol) and march out that door knowing your out of it until the next day lol :P
seriously though the dance makes me feel better, I probably look a right fool tho lol