Single window

Shift + Space / Ctrl + Up arrow = Maximize single window

Quick assign Subsurf

Ctrl+1 = Subsurf level 1
Ctrl+2 = Subsurf level 2
Ctrl+3 = Subsurf level 3
Ctrl+4 = Subsurf level 4
Ctrl+5 = Subsurf level 5

Ctrl+0 = Subsurf level 0

Make links... (subsurf)

1. Edit Subsurf value of master object.
2. Select target object/s and then select master object.
3. Ctrl+L and modifier.
4. Now all selected objects have same Subsurf value.

Append or Link

File > Append or Link...

Link = XRef
Append = Merge

Temp file location

Windows Vista = Users\Username\AppData\Local\Temp
Mac OS X = Go to folder (Shift Cmd+G) and write /tmp


Inside temp folder you can find:

Quit file = Always made when you quit Blender
lastsavedname = Last saved file

Timeline range

Set timeline range = Go to frame you want to set as S(start) or E(end).

Rip UV vertex

Disable (rip vertex so shared vertex can be moved) = Shift+C
Shared location (default) = Alt+C

or from dropdown list