How do you handle proofing?

[crash331]

I am wondering if I should use a service for proofing or do it myself.

Do you usually give your clients proofs of every single image? Are they printed or do you use an online service or CD?

If an online service, what are some good ones for a small studio?

If on a CD, do you just copy low res jpegs or use software?

I have my own website I could upload proofs on, but I think it would be too much of a workload.