The other day I was building a set of temp stairs for a contractor to get his C O. In Jersey you have to build a set going from the garage to the house and out the back from the house to grade level (in this case no deck was built yet). While doing this I was flipping over my 10 galv finish nails dulling the point then driving it in to prevent splitting of the 5/4 decking on the ends. I thought how I learned this a few years back from an old school guy and it was probably one of the most important tricks of the trade I have learned. I am a youngin so don't laugh on me for learning it only a few years back. My down fall is that I opened my own bus 5 years ago so I rarely get to learn any other tricks like this, but I thought it would be a great thread on here. So, what tricks have you learned from an old schooler that you can't live without?