I thought that this was an interesting tip. especially after seeing some CAD users who have many palettes open at once and how much screen-real-estate that these palettes take up.
If you have multiple palettes open, you can do a simple customization to these palettes so that they take up less space on your screen. In the picture below, I have four palettes opened at once and they are all docked at the left of my screen. When I hover over a given palette, it will expand…
In the picture below: I right click over a palette and select ‘Icons only”
In the picture below: This is the condensed Tool Palettes as represented by their “Icons”
AutoCAD Tips 
Is there any way to set Tool palettes expend only when I click on them and not on hover?
I found 2 things for you:
1) Manually adjusting this from the following link. But there is a larger section of numbers that may be different depending on what version of CAD you are using. The example shown is for ACAD 2009
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=12004830&linkID=9240617
2) An APP developed by Jimmy Bermark and it sets this setting in the profile (.aws file) automatically. Again, the latest version is for 2009
http://www.jtbworld.com/PaletteAuto-hideSpeed.htm