Have you ever needed someone else to tie your tie for you?
If so, here is a must read HOW TO: Tie a Tie. There are many ways to tie your tie, there are simple konts and fancy knots. My favorite is the Windsor. Find one that you like and learn how to tie it. After you learn it practice, practice, practice.
Here is a great site that shows you how to tie your tie in a various amount of ways.
Tying a Tie is half the battle in looking good in a suit. Cuffs, collars and dimples are also something you need to consider. Here is an excellent website with some additonal pointers on all things suits.