Where can the private key from a bitaddress.org paper wallet be redeemed? I recently got started by creating a single wallet using bitaddress.org. This contains the public bitcoin address and the private key in the wallet import format.

I now have some coins in there, but don't really understand how to use them. 

How can I access/use my bitcoins? How is it possible to make a payment? What are the different options?

Any advice is greatly appreciated!
A paper wallet has a private key ("Redeem") and a Bitcoin address ("Load &amp; Verify").


You can import the private key in the Bitcoin-Qt/bitcoind client using the Debug console or the command line API.
You can import the private key into Mt. Gox (Funding, then Redeem, Private key) and it will sweep the funds to your exchange E-Wallet account.
You can import the private key into Blockchain.info/wallet
You can import the private key from a mobile by scanning using EasyWallet.org 
(fee applies)
You can import a private key into the Multibit client and possibly with other clients.
You can spend using a private key with Brainwallet.org &lt;-- Be careful with this.