Portfolio for Job Hunting

[Blisterman]

I've just finished my Part 1, in the UK, and am now looking for a job for my year out.
At the moment my portfolio contains all my third year projects: CAD drawings, Process, 3D renderings etc. I'm now trying to make it more attractive to prospective employers.

Does anyone have any advice for doing this?
How many pages should it be?
Should I emphasise process, or the finished drawings?
Do, I need to include things, such as technology and site analysis?
Should I include a lot of projects, or a small number in detail?
Any other hints, or advice?