Some things you should think about before getting started:
Why do you need a website? What are you looking to gain?
List a few of your online competitors.
What do you like about your competitors websites?
List a few general websites that you like. Why do you like these websites?
List a few general websites that you don't like. Why don't you like these websites?
Is there a particular color scheme that your company requires?
Are there any restrictions on logo usage?
Are there any specific images that you'd like to see on your web site?
Who is your target audience?
What will your target audience use your website for? Will they look to get information? Purchase a product? Enquire about more services?