One thing that is important is to not place theory over practice.
I find that the internet allows theory to supersede practice.
Your personal results during practice are the most valuable bits of advice that you have.
Although much of the advice on the internet can be qualified as correct,
it may not be correct for you.
The trumpet is the most messed up instrument ever. If you allow yourself to listen to random advice from people that don't know you, you are certainly inviting problems.