In a sentence or two, sum up the main objective of the site.
Who do you think the audience for your website might be?
What is it you want your website visitor to do when they land on your home page?
What is the main message you want to communicate to your visitors?
Write down some keywords and values that you think represent what your sites look and feel will be like.
Just a few sites you like and a quick sentence as to why you like them.
Who are your competition, just a few sites that are doing the same thing.