I do not use cad enough to remember the short keys, yet when I do use it I need access to them to reduce the amount of time it takes to complete a project.
Here are some of the most common shortcuts. ALT+F8 VBA Run
ALT+F11 VBA Editor
CTRL+1 Properties Palette
CTRL+2 DesignCenter Palette
CTRL+3 Tool Palette
CTRL+4 Sheet Set Manager Palette
CTRL+5 Info Palette
CTRL+6 DBConnect Manager
CTRL+7 Markup Set Manager Palette
CTRL+A Selects objects in drawing
CTRL+B Toggles Snap
Ctrl+G for Toggles grid,Ctrl+R for Cycles layout view ports,Ctrl+y for Repeat last action,Ctrl+T for Toggles tablet mode,Ctrl+L for toggles ortho mode and F6 for toggle chords.
There are a lot of short cut keys for autoCAD. I would suggest writing down the ones you use frequently when you are working, and then keep them on a "cheat sheet". Some of the most common are Ctrl+0 through Ctrl+9, each do something different, so your best bet is to decide which are best for you.
ALT+F8 VBA Run
ALT+F11 VBA Editor
CTRL+1 Properties Palette
CTRL+2 DesignCenter Palette
CTRL+3 Tool Palette
CTRL+4 Sheet Set Manager Palette
CTRL+5 Info Palette
CTRL+6 DBConnect Manager
CTRL+7 Markup Set Manager Palette
CTRL+A Selects objects in drawing
CTRL+B Toggles Snap
CTRL+C Copies objects to Clipboard
CTRL+SHFT+C Copies objects to Clipboard with Base Point
CTRL+D Toggles coordinate display and more.
Some of the shortcut keys used in autocad are:
1)ctrl+A :select all objects in drawing. 2)ctrl+B:Toggles snap
3)ctrl+C:copies object to clipboard
4)crtl+D:Toggles coordinate display
5)ctrl+E:cycles through isometric planes
6)ctrl+N:Creates new drawing. 7)ctrl+O:opens existing drawing. 8)ctrl+P:Prints current drawing. 9)ctrl+S:Saves current drawing. 10)ctrl+v:Pastes data from clip board. 11)ctrl+X:Cuts objects from clip board. 12)ctrl+Y:Repeats last action. 13)ctrl+Z:Reverse Last action. 15)F1:Displays HELP