If you haven't heard of Katherine Willson's research list on Facebook you are missing out on a fabulous resource.
Katherine is a acclaimed professional genealogist and lecturer that has compiled a 11,200 link and growing research list on Facebook.
You probably don't want to print it out ( its in PDF form) it amounts to 328 printed pages organized extremely well and is self searchable.
Katherine's web site is great too !
You will find the links to both below: