Sending an email is surely the best way to get in touch (and I always reply very shortly, promise!)
On Twitter, I mostly look around and follow people who write and post interesting stuff (academic twitter seems to really work!). But you can also contact me there!
In case you are mostly active on LinkedIn, you can also connect with me there!
https://www.linkedin.com/in/andrea-m-8b2238118/
If you want to get in touch via phone, you can find my contact at my institutional webpage
Andrea Martani 