If you could pass on a piece of advice that meant a lot to you when you received it, what would it be?

Don't Eat The Yellow Snow. 

If your first thought is "Of course not!", you're taking it in too much of a literal sense. Yet, taken in a literal sense, you either now what made the snow yellow or you don't. Either way, it's probably not a good idea to eat that snow. Unless you see that yellow stain on the snow and think, "Wow! Lemonade!!". Then again, the chances of someone walking by and spilling some delicious lemonade is pretty low. Maybe you're traveling closely to the local winter lemonade stand but I doubt it. That just seems a little too good to be true. 

You should probably investigate. Smell it. Get a real good whiff. What's it smell like? Yep, I thought so. It's not lemonade is it? Now that you know it's not tasty lemon juice and sugar, what are you gonna do about it? 

I have one really good answer: Don't Eat It. 

Applied to the rest of your life, I think that's some pretty sound advice. Take every situation you come across as a patch of yellow snow. 

Consider the source, do you know where this yellow snow came from? If so, is it a good source or a bad source? Meaning is it most likely lemonade or is it more likely the other yellow liquid? 

Observe the yellow snow. What kind of tracks are leading up to the yellow snow? Is it dog tracks or is it the tracks of children with an empty pitcher next to it? Or is there a hot steaming pile of brown next to the yellow snow? 

Smell the snow. Does it have a sweet citrus smell or a warm ammonia like aroma?

The point is Don't Eat the Yellow Snow, unless you're sure it's lemonade.