One of the best pieces of advice I’ve ever heard is this:
When somebody tells you that you look nice or that you’re beautiful, have nice eyes, are clever – whatever, you should always say “Thank you” and accept the compliment.
I overheard a friend telling someone we knew the above years ago, and it’s stuck with me ever since.
Not “Really? Are you mad?”, or “This old thing? It cost me a penny!”. Or any other negative retort, just “Thank you”.
Try to accept the nice things people say to you because they mean them.
I know it’s easier said than put into action though. I have to catch myself every single time but it’s important I think to realise the difference between self-deprecation and putting yourself down.
Nobody should ever feel the need to put you down, least of all yourself.