I use a mix of PW and M4H, but sometimes I use Mullet God's actions here :
http://www.mulletgod.org/photoshopactions/
and grab some freebies from deviant art. And I found some nice ones here :
http://www.smashingmagazine.com/2008...oshop-actions/
I'd love to buy TRA but they're just too expensive for my student budget