I used to not care about my hair at ALL and actually kept it ridiculously short so I wouldn't have to do anything with it.
Buuut in the last year I've grown it out again and now I care a little bit. Or I guess more than a little bit since I actually bother to straighten it now. :x All I do is shampoo (and conditioner once or twice a week) every time I shower and then I blowdry it and I'll usually straighten it real quick. My hair is just wavy so straightening takes less time than blowdrying. Aside from that though? I brush it in the morning and before bed and toss it in a boring ponytail everyday, if I put it up at all.
I don't use product or anything, my haircut isn't interesting, and... well, I guess I'd trim split ends if I had any but I never remember to check for them. *shrug*