Have a regular 1 hour video call every week or two. Everyone gives updates, support, and keeps each other accountable on goals.
Keep a Slack/Skype channel open in between to say hi, help each other, share wins, etc. Bonus points for meeting locally, but online is fine.
Why? Masterminds are the biggest thing I did going from wantreprenur to actually shipping & earning from products. They're also one of the best things you can do to beat entrepreneurial loneliness. Every week you meet other people who share your struggles and are invested in your success.
Here's a good resource for running one: https://taylorpearson.me/mastermind/
If you find at least 1 other person willing to do this (a few candidates on this thread already, or make a FB / LinkedIn post) I'll happily join the first one to facilitate & show how. Email in profile.
P.S. A coworking space + online communities like founder cafe, product people, complice, wip.chat (h/t other posters) can also be super helpful.