You have come to the right place for advice leading you to a happy and successful tank. Start by reading the thread that Mike linked for you.
Take a look at our gallery and think about what you would like your tank to look like.
Research, Research, RESEARCH. Ask lots of questions on this site, BUT, ask them in the correct forum for the question (General Hardware/Equipment, Saltwater & Reef - Getting Started, etc.)
Read the articles in Articles section
, and read all of these:
How to cycle your tank with out the use of fish
An Ounce of Prevention is Worth a Pound of Cure: A Quarantine Tank for Everything by Steven Pro
Reef Aquarium Water Parameters
Come up with a list of hardware you intend to buy and post it for comments. Folks who have used it will probably chime in with their experience which is invaluable information.