If you have a cable box, look at the back of it to see what type of connections it has. You probably need a component cable and R/L audio cable to connect your Slingbox Solo to your cable box. After you get the Slingbox up and running, you need to use your Droid to connect to the Market and download the Slingbox app for your Droid ($30). You will also need the IR Blaster cable to change channels on your cable box using your Droid or your computer.
Oh yes, you need a cat 5 cable to plug your Slingbox into your router. If the router is not close by, you will need a SlingLink Turbo to connect your Slingbox to your router using your in-house electrical wiring system.