How to find out what process is running SharePoint 2010 so you can connect to debug

create a batch file called spr.bat and put following in it

@echo off
PATH=%PATH%;c:\windows\system32\inetsrv
appcmd list wp

open cmd window where spr.bat file is and run it
Output:

WP "9892" (applicationPool:SharePoint - 80)
WP "1784" (applicationPool:SecurityTokenServiceApplicationPool)
WP "8528" (applicationPool:9ce61ca73f1b467e9220944802480282)
WP "9768" (applicationPool:SharePoint Central Administration v4)

So I would connect to process 9892 to debug my code.