The United Airlines Mileage Plus shopping mall has a couple good deals on Nike and eBags that are higher than I recall seeing. The deals are only until June 16th.
Nike purchase now earn 12 miles per dollar instead of the normal 4.
eBags is normally 6 miles per dollar but is 18X until the 16th.
There are only a small handful of merchants with triple miles for purchases on the MileagePlus mall right now. But, if you would otherwise be purchasing something from Nike or eBags, 12 or 18 miles per dollar as a bonus beats a sharp stick in the eye.