I have health insurance now, but for a year and a half after graduating college, I went without.
if it wasn't an emergency, I didn't go to a doctor. I'm a pretty health guy (no teeth problems, no serious health issues), so it wasn't too bad. the one time I needed an eye exam / new glasses, I went to the same place I've always gone to, but paid cash.
for serious issues, my city has a couple free clinics.