Trust your gut, it never lets you down.
If something seems too good to be true, it probably is.
Remember that children have bad days too. They are people and are allowed to be grumpy, tired and answer back, just like the rest of us. Don't hold them to exacting standards every single day.
You only regret the things you didn't do.
Get outside in nature - it feeds the soul.
Get lost in a book or movie when you feel sad or anxious. Distraction helps the mind.
It is impossible to think of two things at the same time. Your feelings follow closely from your thoughts. Don't follow your thoughts down a dark path, think of something else or imagine a huge stop sign going up in your head to stop bad thoughts.
It is your body. If you want to pierce it, tattoo it, fake tan it, sunbed it, smoke, drink, have a mad hairstyle then go for it. But just remember that there can be consequences of doing these things and you must accept them. Your life, your body, your rules, your choices - no-one else's business.
Remember to breathe. Funny how much you hold your breath without realising it when you are in the heat of something.
Dance. Even if you think you look stupid. Music is the food of your soul. Sometimes getting lost in music is all you need to feel alive again.