Regarding resume length, I'm a huge fan of the "collapsible" approach: if when reviewing your resume I somehow print out only page 1, is it still great? Is everything I need to be interested in you there? If so then you can have all the pages you want.

The origin of this test is that I do not actually want to read your resume. I'm not going to look at the other pages if page 1 is boring! So tell me who you are first and if I'm interested, I will follow along.