ok heres one shot or 2
have full blown proper meals, like cook yourself breakfast and lunch and cook, not make, cook. it takes up a lot of time and should make you satisfiedingly non hungry and happy.
number 2..download or use a 3d modeling programe like 3dmax or maya and create a world ! make a city, or cool objects. it takes up a lot of time and is creativly fun, not just mindless fun. and gives your brain and workout and a sense of self satisfaction instead of just killing things..
andyways thats my ideas...
ohhhhhhhh play with lego if you have thousands of mixed up pieces. dont use instructions, just make lego things.
cheers