Don’t take antibiotics unless you are really ill and you are prescribed them by a doctor.
If you are prescribed a course of antibiotics, finish the course. Take all the pills! Stopping short can sometimes cause a reemergence of a now resistant infection.
Don’t eat meat that is farmed using antibiotics
Invent new drugs
I can’t think of more
You can avoid for selection of resistant organisms by being careful not to use antibiotics when not needed and if you do need use them, finish the course. Afraid there are many resistant microbes surrounding us now, so it could still be possible to get an infection with one even if you have never used antibiotics.
Make sure if you are prescribed antibiotics you take all of them even if you feel better. Only get antibiotics if you really need them and make sure you educate yourself about bacterial resistance. It’s better to understand how bacteria get resistant as well so you can explain to others and raise awareness about antibiotic resistance.