`F12` to navigate to where a variable is declared `Ctrl+Click` does the same
`Ctrl+-` to navigate back from an `F12`. Navigate Backward
`Ctrl+Shift+-` Navigate Forward
`Alt+F12` Peek definition. For when you want to see where it's declared but don't want to navigate away.
`Ctrl+K, Ctrl+I` View a variables type without mousing over it. Edit menu>Intellisense>Quick Info
`Ctrl+K, Ctrl+C` Comment out a block of selected text
`Ctrl+K, Ctrl+U` Un-comment a block of text.