Once you have an idea of your target market then you should explore it with surveys and take note of those things which exist in your customer`s mind.
Surveys are just one part of market research. working online is not like a traditional business, its about getting trafiic to your site and ensuring that potential customers can find your website. You will need to carry out detailed keyword research using tools such as Alexa and Google keywords toolsm to judge competition. this cannot be rushed and may run into weeks and months