If you're always scrambling to figure out what coupons you haven't used up or which ones are about to expire, you ought to check out CityPockets, an online organizer that tracks your buys from daily deal sites.
The free website currently syncs with 28 daily deal sites including the ever popular Groupon and LivingSocial. I found the site pretty easy to use — all you have to do is sign up for an account, pick a couple of coupon sites that you subscribe to, enter in the requisite email and password for each site, and wait for CityPockets to start accessing your various daily deal accounts. Your deals will show up all on one place, neatly organized in categories, so all you need to do is quickly log in to CityPockets to print out your coupon when you're dashing out of the house. Using this web tool is so much more convenient than logging into various daily deal sites, trying to figure out where you bought the coupon.
One of the best services the site provides is to send alerts when your coupon is going to expire. And if you're not planning on using the coupon, you can even resell it in the marketplace.