Find or be a mentor. Or locate and cultivate colleagues on this system. Use this as the basis of activity to stay in touch with people on a social basis to degrees vastly beyond echat and most client relationships.
Have professional discussions. Have a resource to bounce ideas off. Wait until Friday night, call them after dinner and have an e-happy hour.
I recommend video meetings. The Upwork facility does not enable this. Skype video or a platform such as Zoom works great.
I engage in at least five video social-meetings with my network of colleagues and mentees on this system weekly. The connectivity works and feels good.