Set up and honor personal boundaries. Yes, you can say “no” sometimes without bringing the world to an end – it really will keep spinning.
Be intentional. As much as possible, avoid doing anything that contradicts what you say is important to you.
Seek out people and places that nurture and restore you. Limit or avoid people, places and situations that leave you feeling drained or like a loser. You are not a loser and you deserve to be in good company. Protecting your time and space is one of the most important ways to practice self-care. Yes, you have the right to do that.