Flashy way of loading a widget!
This is more a flashy tip than a useful tip, but here it is. First of all, you need to open dashboard and click on the "+" in the lower left corner to get the dashboard dock. Instead of clicking on the "+", you can also load that dock with "Command - =". When you load a widget from the widget dock at the bottom of dashboard, you usually click on the icon. This is the way I have always been loading widgets and that's what naturally made sense to me. There is a faster and mush flashier way to do it however. You can simply select the one you want and drag it to the dashboard. A nice animation will transform the icon into the right widget. What is faster about it is that you don't have to do this whole thing in two operations: clicking on the icon and moving the widget to where you want it. This is because you can drag the widget from the dock to the dashboard and you can bring it to the place where you want it directly. Here is a video screenshot showing this nice animation: