>And how far back in employment do you go?

As far as I need to and when I can't go that far back it's story time.....

>Where should I put my degree? Top or bottom?

At the top but if your graduation date is different and you don't have relevant experience in the interim then you may want to exclude the date.

>Same questions for certification.

Include the date but you need projects that you worked on listed somewhere.

^^ All of this is my opinion and OKHR actually exists so ask them for specifics.