Mine would be.
1.UNPLUG so as not to burn your house down---unplug,unplug and unplug when through playing with trains.----------Just ask SD60M,talk about lucky.
2.DO NOT use----Simple green----- to clean your track.--------Just ask Lee Willis about this disaster.
3.How to make a cheap track cleaning car.Its dirt cheap to make,and is worth its weight in gold. -----------Made by Bobby Ogage.
4.Track cleaning------cheap,and easiest to get.-----Isopropy Alcohol----you can get it anywhere. --------------This tip provided by Gunner John.
5.Last but not least. The---OGR forum----itself.No place on the planet as a better reference for O gauge trains.--------as provided by the membership of OGR.
Well that's it for my 5 tips.
So whats your?
Bryan