So, I have cards...

Sell them on the steam market.

so, i have painis! now what? I dont want it to cover dust!

Step 1: http://www.steamcommunity.com/market
(Edit: Addendum Step 1.5: avoid the bear)
Step 2: Profit!!!

Orrr you can make a card giveaway

Unless you care about the useless rewards you get from crafting them I suggest you sell them and make close to 2$ lol

I'd sell them on the community market, but I bought 4 of them (3 from psychonauts and 1 from walking dead) So I'd lose some money by doing that. I make money by selling booster packs and then buy cards to complete game sets. I'd still profit, but not as much as i would've had I got them all without money.

if i were you id give em to some guy named Captain Teemo! he LOVES cards

I say craft.

Sell them on the Community Market. I sold mine, then bought a Sleeping Dogs DLC when it was cheap.

sell on the market.

well, i see you're level 10 already.
crafting both of them would probably get you to level 11 and give you background, emoticons, and coupons..
or you could try trading them for different card sets you may be more interested in, or for something else..
selling them would get you steam wallet funds..

Craft.

some people (like me) trade game keys for cards. if you don't see anything you like there, steam market turns them into 10 cents or so apiece in your steam wallet, or you could use the bots from steamcardexchange.net to trade for different cards.