What more can I do as a citizen other than consistently vote Libertarian and point out the folly in the current course of govt? Also be aware that the US isn't a true democracy, it is a representative democracy. If you strongly disagree with the beliefs of one of the 2 major candidates then you by and large don't get to really participate other than by talking.
The truth is the libertarian party has too many vocal fringe people to ever be a major force in the US. But if they toned down the rhetoric on things like doing away with national parks and the Fed and just espoused the basics of conservatism then I think they'd easily pull 15-20% of the popular vote in presidential elections and also would win lots of state govt positions. Even with the fringe status, there are more libertarians in public office in the US than all other 3rd parties combined. FWIW I'd have to reevaluate my libertarian affiliation if they ever became too popular because they'd undoubtedly remove all funding from DoE facilities where I do my work and probably get rid of funding sources like the NSF. It's easier to be libertarian when it isn't directly hurting my career