Cheat Sheets help you not to memorize each and everything but allow keeping the little pieces of information right in the board. A web designer usually works in different situations and circumstances including various tools and technologies posing a difficulty to remember each and everything. So, these cheat sheets helps a lot being so handy reference guide. http://www.cyberdesignz.com/blog/website-design/20-most-useful-cheat-sheets-for-web-design/
Nice thanks I used to get some nice cheat sheets like that from ilovejackdaniels.com but jackdaniels got mad at him and he moved to here: http://www.addedbytes.com/
i stumbleupon'd this site, really helpful stuff: http://designtopx.wordpress.com/2009/11/13/roundup-the-best-web-design-cheat-sheets/