I always found PR, and targeted ads working best. You can always use Google's keyword analyzer tool to optimize a low CPC or if you are doing mobile apps, create a Cost per download campaign on Facebook. Depending on how...
I am an seoclerks member who been here since 2012 and just started the process of gigging about 1 month ago, I have some really cool gigs and I urge you to check them out at: https://www.seoclerks.com/user/Gamer456148, I...