TrayBlank is a quick way to activate a screensaver or shut down your monitor right from the systray.
Once you have TrayBlank on your machine you can simply double-click the systray icon and whatever screensaver you have set will start, if you don't remember which one is set simply hover over the icon and it will display the screensaver and what the timeout is set to. This icon additionally shows you when the screensaver is about to launch. You can also right-click the icon for a menu that will permit you to set hotkeys, turn the monitor off, start screensaver, configure screensaver, choose screensaver, set timeout, and set delayed start.
TrayBlank does a great job at speeding up the process of launching your preferred screensaver as opposed to managing it through Windows settings, etc.