The document discusses various traction channels that can be tested and utilized to help drive growth for a startup. It recommends focusing 50% of time on traction development and testing channels in parallel through "middle ring tests" that each cost under $150 before focusing resources on top-performing "inner ring" channels. Specific strategies are provided for channels like targeting blogs, publicity, unconventional PR, search engine marketing, social/display ads, and more to test cost-effectively and gather customer feedback early in product development.