While work­ing with Adobe CQ5 every now and then you dis­cover some new tricks or options, here the list that I use daily:

Remove #cf/
Don’t want to see/wait for the content-finder while ref­eresh­ing pages, just remove #cf/ in your url.

?debug=layout
Shows you all details of the com­po­nents used on your page

?debugConsole=true
Runs Fire­bug Lite inside your browser

?wcmmode=(edit|preview|design|disabled)
This para­me­ter sets your Wcm­Mode in the spec­i­fied mode, makes test­ing for a par­tic­u­lar Wcm­Mode easier .

?debugClientLibs=true
Writes out all Clientlib cat­e­gories as sep­a­rate files (check your HTML-source).

CTRL+SHIFT+U
In com­bi­na­tion with ?debugClientLibs=true will show you tim­ing infor­ma­tion of your page

http://server/libs/cq/ui/content/dumplibs.html
Shows you all infor­ma­tion around the clientlibs used in your CQ5-environment.

If you have other tricks, let me know and I will add them to the list…