What are some tips you could share that you have picked up over your time being self employed?

1. Carry Insurance or get Bonded.
2. Incorporate if possible - LLC is relatively cheap and a good way to protect your personal assets and not tie them into your business.
3. Lease your work associated vehicles for easier replacement as needed.
4. Keep very accurate records for taxes if you use your home as an office.

I'm not out yet but I'm excited to see what this topic is going to reveal! I've often thought of going to work for myself when I retire.

I'm sure there are many more who could offer great advice. Publicity.