I have fine, straight hair. I *used* to shampoo/condition every day, but upon the onset of my last major depressive episode, I simply had no energy to do this (I could only manage to stand under the water and do nothing else). Anyhoo, since then, I have ended up with this schedule:
Day 1 - shampoo/condition
Day 2 - I put my hair into a lazy ponytail/bun and try not to get it too wet when I have a shower
Day 3 - I keep my hair down and let it get wet, but doing do anything else
Day 4 - same as day 2
Day 5 - same as day 3
Day 6 - same as day 2
Day 7 - if my hair is starting to feel greasy, I will restart the cycle; if it's fine, then I will just let my hair get wet.
Your hair/scalp will adjust over time; when I first started doing this, my hair would start feeling greasy by day 3, but now I can easily go a week before that happens.
I should probably add that I don't do much in terms of styling for my hair; it's either down, up in a ponytail, or in pigtails.
Also: I have a shower before bed now, and don't blow dry it very often (and when I do, it is only for a minute or two at most). I wrap my hair in one of those head towels and then, an hour or so later, I'll take it off and go to bed. I will sometimes put a small, dry towel on my pillow so it doesn't get damp (I mainly do this in the summer months; in the wintertime, I will blow dry my hair briefly instead).