Make sure there is at least one photo of you on key pages of your website such as: About, Home, and Contact. At the very least, have on on the About page. It’s important because people respond positively to photos in all sorts of ways and in the case of your own photo it’s part of building trust.
There should also be photos of anyone involved in your business, such as co-owners, staff, or business partners of any type – of course make sure you have their permission.
If you already have photos of yourself throughout your site, check if they could use updating. At the very least, different photos provide a nice change for returning visitors.