If you have a few accounts on Skype (for example one for family, and the other for customers) you are bound to find SkypeLauncher useful. This program allows you to be logged into a few Skype accounts at the same time.
After launching the program you can add each account you have on Skype. There are also some extra options to choose from; for instance, SkypeLauncher can turn on the same time Skype does. You can also save all your settings on a USB drive. Once you have set everything, just close the window - if you need it later, it should be in your Start menu.