What is Self-care? According to https://psychcentral.com/blog/what-self-care-is-and-what-it-isnt-2/ 

"Self-care is any activity that we do deliberately in order to take care of our mental, emotional, and physical health. Although it’s a simple concept in theory, it’s something we very often overlook. Good self-care is key to improved mood and reduced anxiety. It’s also key to a good relationship with oneself and others.

What isn’t self-care?
Knowing what self-care is not might be even more important. It is not something that we force ourselves to do, or something we don’t enjoy doing. As Agnes Wainman explained, self-care is “something that refuels us, rather than takes from us.”

Self-care isn’t a selfish act either. It is not only about considering our needs; it is rather about knowing what we need to do in order to take care of ourselves, being subsequently, able to take care of others as well. That is, if I don’t take enough care of myself, I won’t be in the place to give to my loved ones either."

A useful too in starting to think about what you need to incorporate regularly into your weekly routine for your own 'self-care' are 'self-care squares' which are about understanding the things you need to do for you in order to maintain your wellbeing and can be a useful reference when you notice things are out of balance. You can download the template here /assets/ckfinder_library/files/Self%20Care%20Squares%20booklet.pdf