Start with five the first day. Think about positive affirmations (general and/or personal) and either come up with your own or find some on the web and write them down or type them onto your calendar on your smart phone.
I am beautiful inside and out.
I have a good mind and use it to make good decisions and choices.
I have a wonderfully inviting smile.
I am a work in progress.
I am enough.
The next day, read the first 5 and then come up with 5 more. The idea is to find positive things to write about yourself and to remind yourself how great you are. Hopefully, if you do this every day for awhile, you will not only feel better about yourself, but hopefully, you will eliminate some of the negative self talk that we have all succumbed to at some point or another. Hopefully, you will do it long enough to really enjoy it and make it a habit rather than just an activity or exercise. And hopefully, you will learn to love yourself a little more.