What do you need more credit for? Are you looking to buy?
This is a tough question to answer without more information. It ouwld depend where you are now and what your goal is. For some very detailed info, take a look at teh forums over at myfico.com, it is a great resource to learn more about credit. Here's a link: http://ficoforums.myfico.com/
Generally speaking, the easiest way is to obtain a new credit card or two... But for rocking credit scores, they like to see a balance of credit... Like a mortgage, a car loan, and a couple of credit cards.
As mentioned previously, lenders like to see 2 open/active trade lines. If you don't have two already, check with a local credit union about credit building options. Usually they will have options. IF you open a credit card, just make sure you keep your balance less than 30% of the limit on the card. Ideally just use it once a month (buy gas) and pay the bill in full when it comes in. Good luck.
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