Buy some balloons, streamers, noise makers, pointy hats...get a cake.
Then invite people over...instant party!
I think you would need sponsors, reasonable solutions to pressing problems, and media spots just to become noticed.
Note the difference between the Democrats/Republicans versus the Libertarians/Greens
Sponsorship--Dems and Republican have strong Big corp sponsorship, Greens/libertarians has only grassroots and small business sponsorship
Solutions--Dems Reps use overgeneralized(not extremely left nor right) approaches--they become specific and extreme during times of crisis. Green/Liber promote somewhat extree ideas
Media attention--Whole industries(talk radio, Political news, Political websites) are created from the Dem-Rep interaction. When was the last time a noted Libertarian talked to a noted Green Pary member? Why would we be interested in such a discussion?