While crawling on the net for good list of Windbg commands, I have come across this site which has grouped together all essential commands. This makes it very easy to quickly figure out the required commands while you are deep into debugging…

Here is the link to the page
http://www.windbg.info/doc/1-common-cmds.html

It is also available in the PDF format,
http://www.windbg.info/download/doc/pdf/WinDbg_cmds.pdf