Before doing anything else make sure that you have answered the following questions:
1. What is the goal for your website?
2. Who are your primary and secondary target group?
3. What makes your offer unique - define your selling position
Some things to consider for better results with online marketing
When selecting a domain name make sure it's memorable and not too long.
If possible use the targeted keywords in your domain name.
Don't use underscores in domain names. If necessary use hyphenations instead.
Make sure that your website works properly across multiple browsers and platforms.
Let your visitor know what page they are on.
Be consistent in your use of colours and font types.
Try to keep each page layout as consistent as possible.
Make sure that important links and actions are enhanced visually.
Give understandable names to your images and external files.
Try to avoid animated graphics unless it's essencial for the visitor's experience.
How about your web credibility
First of all take care of all the errors, however small they are. Whether it's typos or broken links.
Don't get carried away with too many flashy things. Focus on what's useful for your visitors.
Keep your site updated.
Make it look professional, match the visual design with the purpose of the site.
Make it easy for your visitors to contact you.
Enhance your trustworthiness using real images or texts.
Unless it's absolutely essencial try to avoid ads on your site. If you must have the ads do keep a balance between ads and your content. Remember also that, according to the research, pop-ups are hurting your credibility and are annoying for the visitors.