While hovering over an ambiguous selection clicking the up/down arrows will cycle through the possible entities you may be trying to select.
Aside from that I have setup some hot keys:
Hide/Show: Space Bar
Constraint (in sketch): End key, Also mapped to an extra button on my mouse
Fit All: Home key
While it is not a keystroke combination shortcut, I do like using the Power Input box to quickly find and select things.
For example "n:Rosemount" will find any Rosemount instance in an assembly.
MarkAF (Mechanical)
How did you program ALT + ENTER to one of the extra buttons on your mouse?
How should I select the extra button on my mouse for this command?
Thanks