1. Work harder than everyone else. Show up early, stay late, be the clinician that folks want to see walking in the door for your shift.
2. Do something academic. This sounds simple but tons of young faculty sit around waiting for a project to take off or for someone to hand them a niche. You'll get a ton of academic credibility by just being productive. I've always taken the approach that I may never write Beethoven's 5th Symphony, but I can be really good at playing Happy Birthday. Write anything you can, lecture on a ton of subjects, for your first 5 years say yes to any project someone offers you. Especially in the growing world of FOAM, you can get your name on 5-10 things/year. It's great if you have a particular area of interest, but unfortunately most everything is already covered. You ain't gonna get an EKG lecture at ACEP or start a new Ultrasound Podcast, might as well be flexible and cover a wide range of topics. Most departments will highly value a faculty member who can churn out work and can wear multiple hats.
3. Get good at lecturing. Talk about topics people don't typically love to hear, apply for all New Speakers competitions at ACEP/AAEM. Take the time to make slides that don't suck and practice at home until you have your talk dialed in. Cold call large conferences (international ones are actually easier to get in) and offer to speak for free, pay your way, do a great job, and you'll get asked back the next time.
4. Don't talk to your friends in the community. I left community practice 5 years ago to go to academics. I make 50% less and work 100% more. The hours are well worth it, I have one of the greatest jobs in the world, but in academics you can become very susceptible to the grass is always greener phenomena. I can do my current job until I'm 80, I don't talk $ or hours with my community friends who are all looking for a way out before they turn 40.