i can think of 3 things right now that i learned the hard way. Read about something before doing it, had i done this iwould never had melted the small plastic dish on my first scale, by pouring FO right into to measure. Buy scents/ fo from a good candle supply store , after driving about hour to buy from store close to me, found out they smell ok, on shelfs but when i order a larger bottle on all of them, they were no good, my gut told me from look of store that it was no good. dumb me bought some anyway. now buy from only well known supplier. Last one is... just because someone else raves about that scent, doesn't mean you will like it or your customers, bought cranberry spice last year , after everyone was talking about it, not only did i not like it...nobody else in my area did. so my lesson learnt from this was to buy sample, first then buy larger amount next time , also learnt the hard way that i nor any of my customers like anything that smells like a man after shave/ colonge and only love spell a few ladies like. the best esson i learnt was just because i think something smells great, don't mean that customers will:) i have made a lot of mistakes and have learnt a lot from the people on this board.