Your digital presence is so vital these days I recommend doing a entire-site review at least once a year. Update staff info, add new pictures and content – maybe change the look of your website.
On top of that, try to keep a blog on the website that you update once a week at least. Keep in mind this blog post can serve multiple functions. You can turn it into a mailer piece, a newsletter, a podcast and a video without much extra work – giving you a ton of bang for your creative effort.
But either way, definitely don’t let your website gather too much dust!