cadet advice

Some advice I would give USAFA cadets if/when I go back to visit.

The most useful major I can think of based on what I saw then and what I've been through now, would be operations research/industrial engineering. It doesn't directly apply to flying (as some parts of mech engineering did for me), but it does apply in a huge way to things like the logistics of moving a squadron to the desert or scheduling training sorties efficiently. Barring majoring in that, a really strong grasp of statistics is good, as well as a good knowledge of Excel (or other spreadsheet program, but Excel is what the AF uses). Also, for those who end up using weapons, a strong grasp of geometry and trigonometry.

Start an IRA and the TSP immediately.

Take the DLAB in whatever language you studied, even if you think you won't pass.

Start your masters degree immediately, get TA for it. I recommend 100% online.

Build an "I love me" book right now, containing all official paperwork, and financial info.

Practice writing OPRs once a semester and write them for your subordinates. Ask your AOC for advice/feedback.