While leveling and running 4 mans at 50 the best tip I can give you is to prioritize what to tank. Don't waste and time/rage/cds on weak or normal mobs. Boss and elite mobs are what you HAVE to tank, after that focus on strong mobs but just let your DPS handle the normal and weak.
Second I recommend grabbing Decimate with your first 3 points. It won't solve your AOE issues but it'll help buy you a few seconds of aggro at the start of a pull and make questing easier as well. Personally I recommend maxing battle cry over quake for leveling (just remember to drop it and max Quake again at 50). A charge + kick on a strong mob then smash, tab, scream + pommel strike works fairly well or use pommel after choking a strong/elite. Push is great also to set up another charge + kick or just to get a mob off a healer when your taunts are on cd.
Don't forget to use your whole toolbox in 4 mans as well, pommel strike and kick become fairly useless at 50 in raids but do very good damage at no rage cost on non bosses in 4 mans.
Using CC is a big help too of course if you can get your group to do it but most groups whine when you ask em to.