What tasks on your computer have you automated?

After using Shreddit to delete my Reddit history periodically for some time now, I finally decided to make a cron job to automate it on a weekly basis. I use it to delete every post and comment that isn't whitelisted, which right now is just a tiny subreddit for a musician I like that I solely moderate and a pinned post explaining why I have a bunch of karma but barely any posts.

After setting this up, it got me curious as to what tasks other people automate in their lives in order to streamline their workflows and eliminate minor (or major) routine tasks.

So, what do you automate, and how did you go about doing it?