Keeping that good hair day going. The trick is to prevent the oil from forming, not try to banish it once it's already there. Here's what I do:

1) Before bed I spray liberally with dry shampoo and brush out.  (Currently loving Living Proof)
2) Let sit for 3 minutes then brush out. This step is important! 
3) Pile loosely on head with clip or side braid. Keep off face with bandana or headband. 
4) Repeat

That's it. It works especially well if you used hairspray or other styling cream to achieve the day one look.