Fertility after loss?

I was wondering what you guys did after a miscarriage to make sure the next baby is as healthy as possible and to avoid future miscarriages

I have some questions

did you take prenatal pills trying to get pregnant and did it help?

did you cut out caffeine? Did it help?

should I avoid all the things like deli meat, caffeine, and overloads of junk food just like I did when I was pregnant to increase chances of getting pregnant again?

does stress actually affect getting pregnant?

how soon did you get pregnant after one miscarriage?