When working with callouts or any assembly development that needs IISRESET

For CRM 3.0:

Prebuild
cscript C:\Inetpub\AdminScripts\adsutil.vbs stop_server W3svc/AppPools/CRMAppPool
cscript C:\Inetpub\AdminScripts\adsutil.vbs start_server W3svc/AppPools/CRMAppPool
Postbuild
xcopy "$(TargetPath)" "C:\Program Files\Microsoft CRM\Server\bin\assembly" /y

For sharepoint portal:

Prebuild
cscript C:\Inetpub\AdminScripts\adsutil.vbs stop_server W3svc/AppPools/MSSharePointPortalAppPool
cscript C:\Inetpub\AdminScripts\adsutil.vbs start_server W3svc/AppPools/MSSharePointPortalAppPool

For WSS:

Prebuild
cscript C:\Inetpub\AdminScripts\adsutil.vbs stop_server W3svc/AppPools/MSSharePointAppPool
cscript C:\Inetpub\AdminScripts\adsutil.vbs start_server W3svc/AppPools/MSSharePointAppPool