"Flexible Dates" feature
The current Marriott promo is stay-based. Since I tend to stay in the same place for a week at a time, the bonus points have been dribbling in slowly. In fact, there weren't enough weeks in the promotion period to get all the stays in, so: hotel-hopping!
I looked up several candidate properties, and I was busily checking each of them for availability at the various discount rates: government, senior discount, AAA, etc. It got to be a little tedious.
When I was checking out award availability at various properties, I used the "Flexible Dates" feature in order to check out availability for up to 4 weeks at a time, and the little calendar would show you when standard awards (for instance) were available.
So, I tried it with my current rate-shopping exercise. It works! Not only does it show the available dates, it also shows the rate for each day that the rate is available. In many cases, this rate changes. Cool!
I can now arrange my hotel hopping to get the best rate, rather than guess and hope something came up.