@Cody Evans Here's another technique that I like to use. Ask for something you don't want. That way you can give it up as a concession at some point in the negotiation.
For example, let's say you are negotiating to buy a house. You could ask that in addition to the kitchen appliances that the washer and dryer remain in the house even though you probably don't really care if the washer and dry remain. It's likely that the seller is going to want to take their washer and dryer with them
Then later in the negotiation you might be close to a deal and maybe as an example you are $1000 apart on the sale price. You could say, ok, how about this, you come down $1000 and you can take the washer and dryer. You "give up" the washer and dryer as a concession to get a $1000 price reduction when you didn't really want the washer and dryer any way.
Asking for something you don't want is a favorite of mine. Concessions can often be used to put the other party at ease and make them feel like they are getting something out of the negotiation. The best things to concede are things you didn't want anyway.
Good luck.