I've been traveling a lot these past couple of weeks and my skin tends to takes the biggest tole. My saving grace is a good exfoliate and moisturizer. Bobbi Brown Buffing Grains is an amazing product that I discovered last summer and have used religiously since.
Quite simple, its a beautiful glass bottle full of tiny grains - add a dime size amount of these to your everyday face wash and you have an instant exfoliate. There is something really quite special about these buffing grains because exfoliantes usually tend to be very harsh but these give the perfect amount of scrub without irritating the skin.
It's best to exfoliate around every three days to once a week, mostly because you don't want to strip your face of it's natural oils. Every three days is great for me because I tend to get a little too oily in the summer from adding on extra sunscreen which tends to build up. If your skin is more on the sensitive side, use less grains and only exfoliate once a week.
I can't recommend this stuff enough! You use so little of it every wash that it lasts forever. Seriously, I've had this bottle for two months and it's still almost full. It's a great investment especially now for the summer.