Cookies serve their purpose in Internet Explorer 7. They let the browser know which sites you have visited so you don't have to get security prompts every time you back to them. However, they can also slow down your browser, which can be frustrating. This video will show you how to delete cookies in Internet Explorer and browse faster.
Oh... and if you're working from home these days, be sure to check out Gadget Hacks' Working-From-Home Essentials.