Buy "Plug" traffic from
Plug Rush and set "niche" on your ads to whatever niche your site is, can also Geo filter.
Find sites in the directory at
Juicy Ads that match the content of your site, make sure to look for the Geo bars and pick sites to advertise on that have high quality country traffic, alternatively you could do run of their network only selecting US as traffic source.
If you can add a tracking code on your links per advertising partner would be smart as then as time goes on you can increase ad spend to things working and decrease ad spend to those sources not working.