She may be Painfully Hip, or at least the author of that site, but Diana is not only a fellow fashion blogger, but fellow member of the oily scalp club. And she's given us the greatest tip!
I've learned that fewer-and-farther-between washes help me to produce less "grease", but Diana not only warned against shampooing daily, which many know already - but she tells us to rinse with a scrubbing motion daily. This can be added super easily if you already shower short-of-the-shampoo every day. Most women do, but some of us are lazier and feel clean hair is the #1 result of the tub, anyway. At least I hope that's not just me. So for us, sure, we will need to add or re-add enduring the frozen feeling of stepping out past that curtain wet and uncovered, and deal with soaked strands, also forget soaking your body attempting to sink-rinse, your underarms might benefit from a scrub, too... Still it sounds super worth it keeping up with this routine to keep or get extra beautiful!
If you currently wait longer than every other day to shampoo, you might try adding a rinse only in-between, and maybe not daily.
I found that dry shampoo really works for an oily scalp. I hate washing my hair all the time, especially if I know that I am going to work out. I usually just do a little dry shampoo and my hair looks fine for the day!
Sephora has a great selection. Also most drugstores carry a brand called PSSSTTT- which works ok too.
Hope this helps!