Thought I’d check out Dollar Tree, since they’re now accepting manufacturer coupons.  Very little to use them on, though, because the vast majority of products seems to be private labels, off-brands and other oddities – did you even know that Marie Callender made brownie mixes?  Grabbed the sales ad on the way out and here’s what I can see, coupon-wise:

Colgate 4 oz toothpaste is $1.  use the 75¢ coupon in 8/26 S.
Scotch packing tape is $1. use the 50¢ in 7/22 S.

And that’s it.  I recommend Dollar Tree for things like bleach and SoftSoap (35¢ in 8/12 S), but otherwise?  Stick with the grocery/drug store deals.  If you go with coupons, I’d advise printing out the new Dollar Tree coupon policy and taking it with you for the next few months...justincase…

Different areas stock different products – your location might have more brand-name products, in which case you’re way ahead of the game.