I change a lot out of boredom but this is what I'm currently doing.
Monday: Back and chest
Wednesday: Legs
Friday: Delts and arms
Off days are cardio, body weight stuff, and maybe heavy bag.
Also from week to week I change exercises completely. Just again for boredom sake and to a lessor extend over use. So back day one week might be power cleans, pull ups, low cable row, dumbbell row, narrow grip pulldowns, stiff deads, and weighted back extensions. The next week could be machine pulldowns, bar row, t bar and deadlifts.
There is a lot of over lap with this. On back and chest day both bicep and tricep gets hit hard with all the pushing and pulling. Legs get hit twice from the direct day on Wednesday and on Monday when I do either power cleans or deadlifts. I can go down all body parts and see over lap from non direct days.
Right now I'm staring at a bottle of Jack Daniels contemplating missing a cardio day. If I don't get on my treadmill soon in my basement Jack is going to win.