The best time of year to find some great clearance items is shortly after the season is ending. Right now Kohl's has a ton of long sleeved shirts and pants on clearance. Since I never buy clothing at full price this is good place to find some real bargains.
Make sure you look over the pieces you plan to buy, especially things on clearance. Check all seams (especially underarm and crotch seams) & buttons. Some of these might be missing, or need some minor repairs. If this is the case ask yourself it it is worth it. I passed on a long sleeved t-shirt today that was 4.00 but the seams didn't look very cheap.
Never buy anything you don't love, just because it is cheap. If you don't love it don't buy because chances are it will sit in your closet and you've wasted money. I follow this same principle anywhere I shop whether it is a garage sale or the mall. I'd rather walk out of a store with nothing than spend $10 on a shirt I'll only wear once. Lastly try it on and make sure you love it.