Start with discovery. Spend some time on it. Find what you really need. Content, content, content.
Finding the assets you need starts with content. Having the right message. Finding the descriptions of your services. Finding the reason why your clients are at your site. Content is king.
Photography. A picture is worth a thousand words. Finding the right image is so important. Developing accurate graphics to explain you business objectives. Choosing a CMS that you can actually update (WordPress). Finding the people that know how to design, develop and maintain your online presence is so important.
So, discovery, content audit, and real pros to put it all together.