<Insert usual caveat about opening charts>
I'm dealing with the same thing at the moment, since I think I'm only just starting to get the experience and sample to start to make some informed decisions about what hands I'm opening and calling with profitably, I'm also going on advice from my coach.
I'd tighten it up considerably utg, fold the smaller PPs (88 and smaller) utg, and fold like 7s and smaller in the hijack. The small PPs just have no playability whatsoever and you end up OOP stabbing at the flop with a 2 outer if you get called. Of course, if the player IP are tight and the blinds are donkeys, loosen it up a bit but the smaller PPs I'd still fold, and add some more SCs and the crappier offsuit broadways that are still ahead of a droolers calling range.
Loosen up the cutoff and button to like 35% and 50% respectively - open any 2 suited cards from the button, and any offsuit hand with any playability at all. Remember the purpose of opening super wide from the button and cutoff is not to steal the blinds, but rather to play pots in position against them, it's OK if they fold preflop, but you also want to play hands that have good potential to let you stay appropriately aggressive on the turn without spewing with no equity, that way you also take down a ton of dead money on later streets.
I'd also tighten up in the SB to like a hijack range, or even utg if there's an aggro or stationy BB, with a nitty bb, go wild.
I'd also call less, and 3bet more, with a single raise in front on the cutoff or button - you can probably 3bet basically anything in your calling ranges to good effect, but of course it depends on who you're 3betting - if they call a ton, tighten up to an appropriate value range that has good equity against what they are calling with, fold most other stuff, if they fold a lot 3bet them with both the very top of your value range (that is ahead of what they do call or 4bet with) and a ton of utter crap with no playability whatsoever that you would otherwise have to fold - this way you end up extracting value from otherwise unplayable hands by brutally victimizing them for being a nit and you also show up with the nizzles when they call and you play a big pot.