If you have a hard time remembering to do something, PesterMe is the answer. It lets you manually set a reminder duration and some text that it will pop-up with at the interval that you specify.
As you can see in the screenshots to the right there really isn’t much to the application. It is kept to the bare minimum but there is also a System Tray icon that you can use to have it stop pestering you or to configure what it is pestering you about. So when something needs to get done…there is no better way to remember than to receive the pop-ups that we all normally dread! Oh yeah…and it can play a sound as well. 
Note: No installation is required.
