I don't know why but this one has passed me by and it's such a useful feature! To explain:
When you right click on a method, variable etc in vs.net editor you can select "Go to Definition" - which is a great way of viewing the relevent code. But how do you get back to where you were after you have finished viewing that code? VB 6 used to have a "Last Position" option on the short-cut menu but that is not in vs.net by default. I've been making do with manually finding the last position or by optimistically closing the window and hoping I'd end up in the right place. But of course that is way too much work!
Instead you can just select Navigate Backward from the View menu or press Ctrl + - (that's Ctrl and the - key) - life will be so much simpler now. The View menu also reveals a Navigate Forward (Ctrl + Shift + -) which is useful too. And blow me there are even a couple of buttons to do the same on Standard Toolbar - I can't believe I have missed this!