You can always contact me via firstname.lastname@example.org. Additionally, I am registered on several social networks you can use to get in touch.
If you want to send me a message privately, you can use keybase.io. My key has the fingerprint
043B E044 6A20 6379. It allows you to send my an encrypted message no other person can read. If you do not use keybase.io or have no GPG key, you can use keybase.io's encryption page to send me an encrypted message.