#1 Pick a very profitable niche on clickbank
#2 Create a YouTube account.. put real effort into making it nice, give it a customized banner, a branded name, phone verify it etc.
#3 Upload minimum 5 high quality videos a day to that account targeting long tail keywords (there are free video making services online you can use)
#4 Use either a $1 domain to redirect to the affiliate link or a URL shortener
If you move forward in a smart way, and actually produce quality videos, you can start making money within a month while spending pretty much nothing.
Also you can research the meathead method, it costs pretty much nothing to get started. I've run traffic straight to an affiliate link and made a lot of sales.