What MsMittens said is very good advice. To add my part becarful about what you click or don't click. Be very weary of settings that "remember you" such as automatic login to a site. This enables people to sit at your computer and do whatever they please. Although many highly sensative sites such as Banks and StockMarket time out if a connection is idle for certain amount of time, other sites don't (*cough cough Antionline) and you must specifically logout. Also browsers such as IE allow you to save your passwords (annoylingly I have found it prompts you to save a password everytime you enter it in) I would turn these features off and never save passwords. By doing so you are opening yourself up to a heap of trouble.

DeafLamb