After you determine your estimated demand for your (chosen) product, you may want to know your competition as well. There are a few ways to go about doing this. The simplest way is to go to the Google Search Engine (http://www.google.com) and enter the keyword(s) that you are targeting and do a search. Thereafter, you should analyze the first 10 natural search results. You should also count the number of PPC ads that you see appearing as well.
Thereafter, you should use “AllInTitle” to determine your true competition. Doing an “allintitle” search is to find out which are the sites that have all the keywords that you are targeting in their title. This is one of the Search Engine Optimization (also known as SEO) techniques to help the site in a better ranking. Thus, chances are that the sites that you see in an “allintitle” search are your serious competitors since they have intentionally put the keywords in the title.
To do an “allintitle” search, you just have to enter “allintitle: you keyword” in the search bar. For example, if your keyword is photography tips, you just enter “allintitle: photography tips” in the search bar and do a search. The results that you see in the left natural results are the true competition.