Change Grip Mode With Spacebar

When simply clicking on a grip when an object is highlighted you automatically go into the stretch command. Press the space bar and you go into the move command. Press it again and you go into rotate, again for scale, and again for mirror. 

Changing the visual effects of selection and rollover highlighting

Want to change the visual effects of selection and rollover highlighting? Advanced settings can be found in "Options->Selection->Selection Preview group->Visual Effect Settings…"

Copy with a base point

Copy with a base point the simple way; 'Ctrl+Alt+C' then select your base point, 'Ctrl+V' to paste. 

Restricting rollover highlighting to improve performance

Try setting the SELECTIONPREVIEW system variable to 2 if the rollover highlighting functionality degrades performance in large drawings. This will restrict rollover highlighting to only be active when prompted for object selection from within a command. This can also be set from "Options->Selection->Selection Preview group".

Use Profiles to Transfer Settings Between Computers

Once your AutoCAD environment (file paths, drafting settings, colors, etc.) is just the way you want it use Tools/Options/Profiles/Add to List and then Export it as .ARG file anywhere on your network. Later when moved to a different computer simply go to Tools/Options/Profiles/Import to Apply your settings. Read more on Workspaces and Profiles from AutoCAD Help/User's guide/The user interface/Customize the Drawing Environment