Give yourself a compliment.
I learned this trick from Lauren Conrad's Style, and while it can feel cheesy at first, it will quickly become natural. As women, we often tear ourselves apart everytime we look in the mirror, so by pointing out one good thing everyday, we can slowly transition to thinking more positively about ourselves. It doesn't have to be physical, either: you can compliment yourself for hitting a high note while singing along to T Swift or acing your math quiz.
Learn something new.
It's a pretty well-known fact that it's easier to be confident in your abilities when you are competent in them. Learning something new everyday is a great way to develop your talents and feel more confident in them.
Give someone else a compliment.
It's kind of a funny contradiction, but focusing too much on yourself can actually make you feel worse about yourself. By challenging yourself to think about others, you can think outside yourself and become a better person, which will also help your self esteem!
You don't need to have a "perfect" body to have healthy body image, but working out can definitely help you feel more confident with your shape and size. As I work out, I begin to focus less on what my body looks like and more on what it can do. I'd much rather be able to do a handstand or run long distances than have a six-pack or thigh gap. Even if you're really busy, you can squeeze a five minute workout somewhere in your day.
Keep a to-do list.
I get a crazy sense of accomplishment from checking items off my to-do list. It helps me focus on what I've already done, rather than what I have to do still (and I feel more organized, which also helps my self-esteem.)
Surround yourself with positive people.
You know that saying "You are your own worst critic?" If you find yourself doubting that because of the people in your life, it's time to do some relationship detoxing. We all have to learn to overcome our own fear and self-doubt, so don't add external doubt into the mixture as well.
Dress to the nines.
Taking pride in your appearance isn't vain, but it definitely helps you improve your confidence. Take time everyday to take care of your hygeine and personal health.
Take note of your surroundings.
If your room or house is a cluttered mess of bills you haven't paid and exercise equipment you haven't used, chances are it won't make you feel very good about yourself. Keep your living areas clean and don't shy away from displaying something that makes you feel good about yourself: whether it's a certificate, a picture of yourself you really like or a piece of artwork you did. Also, try to avoid unnecessary situations that make you feel bad about yourself.
Assess your media.
I think we've all heard about how Photoshopped images and boastful social media updates can make us feel down on ourselves, but how many of us actually apply that information? Unfollow people who boast too many braggy statuses or pin too many "fitspo" pictures, rethink your magazine subscriptions or do whatever you need to do to make sure you feel uplifted when you log on to Instagram or pick up something to read.
Set attainable goals.
While setting unattainble goals can be detrimental to your self-esteem, doing the opposite can grow it. Whether it's a long-term or short-term goal, make a plan and stick to it until you accomplish it.