1. Try to narrow as much as possible what your goals are. As it's said, "If you have no target, you're certain to hit it."
2. I can't state enough that the future of recording will be mostly dominated by musician/writer engineers. Those who make a living solely by engineering will be rare. Already I compete with musicians who own home studios...some good studios, and some are decent engineers. You have to realize that the future of this biz is going to be run by multitaskers.
3. A good school is usually a good idea. A good school with links to the pro world is a good call, but NOT essential
4. If you can get into a studio as an assistant/runner that's the very best thing you can do. From there you learn, but more importantly, you make connections.
5. Practice, practice, practice! Learn from anywhere you can, whomever you you can and have a pleasing personality! (There's a blog I wrote on this called "Attitude." Read it and take it to heart)
6. Luck will have a huge factor in this. But as the great golfer Gary Player said, "The more I practice, the luckier I get."