Any time you create content, your readers should have an immediate way to click back to your site.
Guest posting? Add a bio section with an invitation to learn more about whatever you just posted about – preferably a link to another specific, related piece of content.
Should you have a website?
Check out the last section of this guide for pros and cons.
Super-bonus tip: Create a custom bio for your social media – and refresh it at least twice a year (quarterly is better)