What documents do you collect from a tenant when signing a lease?

[Chris Bingham]

I have collected the signed lease, fees sheet, and the cashiers check for the deposit and first months rent. 

I do a background/credit check and I verify the employment with the employer verbally, but have not been collecting a copy of the pay stub or copy of taxes (if self employed...which I haven't rented to yet). 

Also, I have them list the Drivers License # on the application, but haven't been making a copy of this either. 

I want to start being tighter on collecting any documents that I should. What else do you ask the tenant to provide when they sign the lease?