A widget that suggests some other links to follow at the bottom of each page. I recently learnt that the most important thing someone reads on a website is the second article - since that is when they can become 'hooked'. When you reach the bottom of one of my pages you get a confused mess of forms and no obvious way to find anything else on the website.
An audio livestream that is present on every page that plays live sounds from either my garden1 or some generative music I've made.
Sending emails to commenters when I approve their comment or when someone responds to one of their comments. (This is actually almost done, and will be deployed soon)
A catalog of all the items of clothing I own and what I think of them.
Comments on every page! Not just on blog posts
A widget on the homepage (or sidebar) that surfaces the latest comments or webmentions posted by readers - inspired by the comments on gkbrk.com
A better way to stop spam comments. So far I've tried manual approval of comments, and using Cloudflare's turnstile to prevent bots from posting comments. The first is too much effort, and the second appears to have an extremely high false positive rate. (The turnstile widget doesn't even get rendered with my ad blocker!)