I always tell clients to look at their time like a piece of pie. How they slice that pie matters, because there needs to be a slice for everything that's important to you, including yourself!. If anything of importance is not included then your life will not feel balanced. Now these slices of pie are not fixed in quantity, they are flexible, and are ever changing. Sometimes your child will have a bigger slice, sometimes it will be work, it's always changing.
Self care is a big, big important part to include in your pie design. If not, life won't feel balanced, and eventually you will crash and burn. So find time for yourself in order to care for yourself! It may be a minute, it may be a weekend, but whatever it is make it count. Make it doing something purposeful. Commit to it. Be mindful of it. The purpose may be to sit still and watch the sprinklers, or taste each bite fully, read a book, take a walk, have a 15 minute shower. It doesn't matter, as long as you own it, the time is for you, and it helps to energize you. Get the idea?
Now, make yourself a list of all the ways you have in the past done self care, do presently, and would like to do tomorrow. Start thinking about time frames, days, opportunities, and desires. Maybe make a list of new self care ways you want to incorporate. Focus on you for a change, even if it's only for a moment!