What kind of DVD media do I buy?

[Bonniep]

Help! I've just purchased an LG SuperMulti DVD Writer 4040B (online) and would like to have media to write to when it arrives. I've searched the web and now am totally confused about type
(- , +, ram, etc) and the quality. Can someone give me some direction on what to buy and where to buy it? I plan on copying some tapes to dvd, a dvd that we had made from a video recording, and putting photos on dvd's. Thanks much for any help you can give me.