Factors affecting consumer's decisions

Source: 4.bp.blogspot.com

Why I am interested in factors that affect consumer's decisions?

I’m interested in this topic because I like researching and reading about marketing. I think marketing and advertising are really interesting and complex topics that are always changing and adapting. It’s always possible to find something new regarding this topic.  

Question I plan on answering?

What factors affects consumers decisions?

Other questions I want to answer?

What is the effect of packaging? Does advertising increase product’s popularity? What are other factors affecting sale?

Databases, websites etc. I am going to use:

Wikipedia, Theconsumerfactor.com, marketing91.com and other web sites. Also, I will ask my Economics teacher and use info he gives me. Moreover I will try to find books that are linked to this topic that can help me with my research.