Save yourself (and most importantly me) some time and:
Email.
The classic. If you prefer more formal means of communication, this is the way to go. I check my emails fairly frequently, so you can expect a response soon.
Telegram.
Unless I'm asleep, I'll probably reply to your message pretty quickly. Convenient as that may be, please don't use this for any chit-chat.
Twitter.
My DMs are open, however it may take a couple of days for you to get a response. Twitter barely shows me that I got new message requests.