1. Find your stop.
Step outside your building and look around. SF MUNI says there's a 90% chance there's a stop within two blocks of where you are standing. If you can't find one just by looking around, check out a map online at www.sfmuni.com
or call 311 and a friendly operator will help you out.
2. Figure out where you want to go.
You can go about this in a few ways. You can get old fashioned and look at a map and figure out which brightly colored lines go to where you want to go; you can go to www.511.org
and use their handy Trip Planner program and let the robots do it for you; or you can call 311 and have a real, live person get paid to figure it out for you.
Make sure to check bus times before you go hastily throwing on mismatched clothes and running out the door. You might spend half an hour waiting on the corner with your uncombed hair blowing in the mighty San Francisco breeze. Bookmark www.nextmuni.com
on your computer, or if you haven't paid those pesky internet bills call 311 and they'll tell you just how fast you have to run to catch that ride. If you're already out and about, plenty or stops have electronic screens that show you when the next buses are arriving. Though keep in mind that the NextMUNI displays don't always conform to the laws of time; three minutes may sometimes mean five, and "arriving" may even sometimes mean "this vehicle doesn't actually exist".