Thinking of getting a credit card ....

to help build my credit and get a few things that I want .... but I could use some suggestions as to which are best .... I've heard of Chase Freedom and the store (Target, Wal-Mart, and Amazon) cards but I also know I need something with low interest but I want to be "grown up" and get good credit in my name .... so if anyone has any good suggestions .... BESIDES about keeping up to date on the payments .... please comment :D