when i can squat comfortably best thing for my hips is to squat. when i can't squat comfortably then i need other stuff, though...
i do a class. used to be 'bodybalance' but now it is 'centergy' but it is the same thing, really. blend of yoga, taichi, pilates. some mobility stuff, some stretching stuff, some core work, and some playing dead at the end.
my experience with the class varies a lot depending on the instructor.
when i started out i was 3x per week but eventually (once squats felt more comfortable) dropped it back to once per week. after a while i thought i didn't need it really so i quit. couple months after that i injured my back from squatting (not hitting tight bottom position). i've learned... i need to do it. started back and still going 3x a week. getting better each time i go. still making progress.
current instructor was driving me a bit batty to start with. i've learned that there is such a thing as 'power yoga'. i think she comes from that perspective. her transitions are fast and powerful, yeah. she is actually pretty muscular for a yoga chick. athletic. to start with it felt jolty and injury potential... now that i'm getting more mobile i'm enjoying the power and pace a great deal.
sorry about the hippy crap. maybe you can find something without the hippy crap element?? i really do reccomend it... as a mental deload if nothing else. hard to explain.