Any trick of the trade or tips for Sapper school?

Know your knots inside and out, checks and safeties. The demo stuff they will teach you, but it helps to have basic knowledge of components and purposes. You will have no problem with patrolling phase, be ready to step up and stay focused. Sleep management, drag your battle through everything and don't go see a medic unless you are really injured.

I'd also suggest using the search bar for "Sapper" and filtering by "answers"