Having been working with vector shapes a lot yesterday, I was getting pretty frustrated when trying to switch between tools quickly. Though it's not in the menu commands or tool tips within Photoshop, I found this table of helpful hints in the help file. I realize that for most people it's going to be pretty boring content, but for me, it'll be a handy resource for vector art (and most likely easier to find than looking it up in the help file).

Result	Windows	Mac OS
Select multiple anchor points	Direct selection tool + Shift-click	Direct selection tool + Shift-click
Select entire path	Direct selection tool + Alt-click	Direct selection tool + Option-click
Duplicate a path	Pen (any pen tool), Path Selection or Direct Selection tool + Control + Alt-drag	Pen (any pen tool), Path Selection or Direct Selection tool+ Command + Option-drag
Switch from Path Selection, Pen, Add Anchor Point, Delete Anchor Point, or Convert Point tools, to Direct Selection tool	Control	Command
Switch from Pen tool or Freeform Pen tool to Convert Point tool when pointer is over anchor or direction point	Alt	Option
Close path with straight-line segment	Magnetic Pen tool + Alt-double-click	Magnetic Pen tool + Option-double-click