The first thing I plan on telling students is to be very organized and neat while working out math problems. In my experience, a lot of wrong answers stem from simple mistakes, like forgetting a negative sign or forgetting an additional term. Second, I plan on teaching students how to recognize which techniques are required to be applied to a specific problem. From there, the problem can be broken down into parts, and the correct techniques can be applied to each part. Then, putting all the pieces together should lead to the correct answer.