Started investing in my site, what is the best investiment to raise your blog traffic

Hello guys! I have some questions for you:
-I now decided to invest some money in my blog traffic, where should i start?
-Which way brings you the most traffic, Buying banners, links, PPC (adwords)
-I don’t wanna spend to much money for beggining, which way should i choose?
Hope you will help me,tnx!

Original post by mg_