I have emailed, texted and called. Not often for any of them, but occasionally. I usually text if I need an immediate response. I have texted such things as "having a hard time", or "can I talk to you". One time after dealing with my abusive elderly mother I texted "I am going to rip off my mothers head"...he called back quickly after that one...lol. But I am really bad at talking so the phone calls are him reassuring and me just answering "ok"

If it isn't urgent and I have a lot to tell him I email. He always responds to his emails very late in the evening, so I know if I email him during the day I probably won't get his response until the next morning. His responses are short, but encouraging, and it is good to write because my thoughts are clearer that way and I don't feel like a dimwit.