The "Couples Therapy" doc tells TMZ she's been talking to several single people who are grappling with the new reality of self-quarantine and trying not to go stir-crazy, and she says the best way to deal with it ... wake up with a plan!!!

Dr. Jenn says for those working from home, this means starting each day with a purpose and a schedule -- as if you were still going into the office -- and to continue focusing on hobbies, creative endeavors or self-care when work hours are over.

For the newly unemployed or furloughed, she recommends using the time to improve one's health ... through exercise, self-reflection and intellectual stimulation.

That's all great, but obviously, people still need to engage socially with the outside world -- and Jenn highly recommends reaching out, but not the way ya used to do it.