1. Never buy pins off ebay
2. never say "this pin is never leaving my collection"(keep a cycle going)
3. Choose pins based on gameplay and not theme.
4. Shows and expos are the best place to get pins. Big selection, great prices, and the ability to see and play. The deals to be had are worth the travel and or truck rental.
5. Pinball is it's most fun when enjoyed with other people. Invite people to play as much as you can. Find a group of people and start a pinball night.