Build for a few seasons, log in every once in a while, instead of try and win the games you can, learn and enjoy the game?
Build for a few seasons, log in daily and learn from experienced players in the forums, instead of wasting money making mistakes like competing for a promotion you're not ready for, so you don't waste your resources and fail to progress in the game.
"Build as much as you can as fast as you can" doesn't mean build spend every cent you earn on seats. My first season with this team I was against bots only, so I spent enough on the players i needed to promote, built a few seats, then banked the rest of my $100k weekly income for a couple of trainees and trainer (investments, not buying wins). Since then, I have invested millions in seats as my number 1 priority. Why? Because I'm not ready to promote. Why would I spend millions trying to get to a level I can't sustain, when I can invest millions to be sustainable at the next level while being competitive at this level?
I make $150k weekly in div 3 (which is now the lowest div with only 2 bots) because I'm 9-1 for the season spending less than the salary floor. I don't need to promote, so it would be foolish to waste money trying. I'd make slighty more at div 2, but ultimately would have to spend millions (on top of the millions I spent to get there) just to avoid relegation. Where would I find the millions that I've invested already in arena and training at this level while trying to keep my head above water and avoid demotion at the next?