- Anything related to infra (I do Azure, so I write Azure templates to deploy everything, even PaaS/FaaS stuff)
- Linux provisioning (cloud-init, Ansible, and a Makefile to tailor/deploy my dotfiles on new systems)
- Mail filing (I have the usual sets of rules, plus a few extra to bundle together related e-mails on a topic and re-file as needed)
- Posting links to my blog (with screenshots) using Workflow on iOS
- Sending SMS from my Watch to the local public transport info number to get up-to-the minute bus schedules for some pre-defined locations (also using Workflow)
- Deploying my apps on Linux (I wrote a mini Heroku-like PaaS for that - https://github.com/rcarmo/piku)
- Searching for papers/PDFs on specific topics (built a Python wrapper for arxiv/Google/others that goes and fetches the top 5 matches across them and files them on Dropbox)
- Converting conference videos to podcasts (typically youtube-dl and a Python loop with ffmpeg, plus a private RSS feed for Overcast)
Every day/week I add something new.
(edit: line breaks)