One other thing to remember is that no matter how hard you try, you won't ever find anything an NFU can do that a FU can't. Your skills, whatever they are, won't be unique, because the Force isn't a tradeoff. Every FU is capable of everything that any NFU can do in addition to the Force. Trying to be unique will end in disappointment, and even trying to be peerless is tricky for most NFU skills, since FUs seem to take their gift of cosmic psychic-magic to mean that they can already conquer all mortal endeavors.
What FUs often don't have, however, is perspective. Not many FUs care about being a galactic-class salesman, an incredible software developer, or a brilliant admiral. Lesser-known but still fantastic skills are easy places for NFUs to shine. On top of that, NFUs don't have to split their focus, which means that as long as you keep doing your job in every thread you're in, you'll chalk up unholy amounts of experience at whatever that job is, especially in comparison to the FUs who try to do that thing in addition to being Jedi/Sith/whatever. Being a galactic merchant tycoon is the province of NFUs not because being blind to the Force makes you somehow better at managing money, but because Alric and Danger and Alna have a ton of time to spend in-universe and no silly "mysteries of the galaxy" to contemplate.
Something else to keep in mind is Boba Fett, especially when considering what Alric said in post #2. Every NFU needs a fantastical asset, etc etc. Alric has his charm, Danger has her connectedness, Thrawn had his military brilliance, so what kind of exemplary quality does Boba Fett have that allows him to contend with a Galaxy tailored for Force-users? The same thing his daddy had. Resourcefulness. This is a hallmark of a lot of NFU fighters on this board ([member="Triam Akovin"] comes to mind). Having a trick up your sleeve for freakin' everything goes a long way to making your NFU a genuine threat to psychic-space-wizard-laser-ninjas.