Fitness plays a major role in self care. When you start treating your body right, positive response is seen. Whether, yoga or long walks, both helps in the well working of the body in several ways.

Exercise should be a part of your day to day life. Eating habits also effects the working of your physical body. Good food let's you work efficiently.
Long walks or run are the best alternative of exercises or yoga.

Feelings can hit you hard, leading to heavy emotional response. Self care is mostly about emotional stability. Once you take care of yourself, the mood swings become rare and you are able to keep yourself in your own control.
Sharing how you feel can help you get things out of your head and if not writing it down helps too.
Self care happens with interconnection. You should praise yourself more as a person. Comparison doesn't reach you anywhere but confidence and will does.
Take out time to understand yourself first.

Connecting to oneself is important. Just like social connect, a little time to spend with oneself is as important. There are various ways of doing this...... Journalling being the easiest in day to day life.
Yoga, medication and nature helps you relieve the stress and spend some time understanding your own thoughts and emotions.
Try having a coffee early in the morning while listening to the chirping of the birds.