On anything, be it airline tickets, tech stuff, clothes, etc. Where have you usually found the best deals? (Any sites, including those that sell used items).
Tech Stuff Mostly (Random travel, clothes, included):
Credit Card + Frequent Flyer + Travel (they all work together believe it or not)
2. Flyertalk.com (see their MilesBuzz forum especially)
3. http://boardingarea.com/blogs/frequentmiler/ (best gamer of CC rewards)
Gift Cards at a Discount (GREAT FOR CLOTHES!!!)
1. PlasticJungle.com (*Make sure you go through http://www.topcashback.com/ref/swecmzkor for extra 4 percent cash back, yes that's my referral link so I get $10)
2. CardPool.com (see topcashback above)
4. GiftCardGranny.com (comprehensive overview of the above 3 website)
Cash Back Websites (Almost every eCommerce site offers cash back on top of Discounts)
1. http://www.topcashback.com/ref/swecmzkor (The best payouts by far on most websites)
4. http://evrewards.com (searches all cash back websites, its not 100 percent accurate but it helps)
* Those are my referral links above, you don't have to use them, but I assure you 100 percent that they in no way influenced my recommendation
Best Coupon Website (Always check for coupons here in addition to cash back, they work together 99 percent of the time)
I like Techbargains.com, but the more you look at them, the more crap you buy. Outside of a phone and computer, what more gear do you need?
Fatwallet.com is pretty much the first place I look for stuff, but not great for travel. Subscribing to TravelZoo brings some decent deals every week, but there's not great travel deal sites, probably because margins are really tight.