A slick shortcut I stumbled across while doing some hobby coding at the weekend.
Add a new type to your class, in the code below it's an interface I want to implement. Place the cursor over word and a little Smart Tag indicator appears:
Hit SHIFT-ALT-F10 and the smart tag menu appears with the option to add an import directive for the unknown type you have just entered.
Hit the ENTER key and the import directory is automatically added.
Using the shortcut keys is much simpler than trying to invoke the smart tag menu via the mouse. I really like the fact that the import directive is automatically added to the "Directives" region I had defined.
If you hit SHIFT-ALT-F10 again - the implement interface Smart Tag menu is displayed. I love the addition of smart tags to Visual Studio. Simple yet effective. I just wish there was a Smart Tag option for changing the access modifiers of members and that the Smart Tag analyzer engine wasn't case-sensitive (i.e. I could type in "iprovider" and the Smart Tag menu would still appear).