Here are a few things to keep in mind before you travel to San Francisco:

• Do not call the city San Fran or Frisco. It's San Francisco or SF.
• San Francisco is a weird city, from its attractions and events to its inhabitants. Keep an open mind while visiting.
• Pickpockets target high-traffic areas, particularly public transportation and Fisherman's Wharf. Don't leave valuables in the car, either.
• Don't rely solely on public transportation. Walking is one of the best ways to get around and see the city.
• You'll see locals wearing everything from hoodies and jeans to suits. Wear what makes you feel comfortable and don't be afraid to dress up a little when the mood strikes you.
• San Francisco can be chilly year-round. Pack a sweater or light jacket no matter what time of year you visit.

San Francisco has plenty of free activities, including:

• Wandering its famous streets and neighborhoods, like Lombard Street, the Castro, Chinatown and the Mission District (plus, many of these areas have plentiful street art)
• Spending time in nature at Golden Gate Park, Yerba Buena Gardens, Lands End or Baker Beach
• Snapping photos of the famous Golden Gate Bridge
• Visiting the de Young Museum's collection of art and textiles (free on the first Tuesday of the month)
• Hiking Twin Peaks for unparalleled views of San Francisco

See more free things to do in San Francisco.

Short on time? Check out this one-day itinerary for all the must-see San Francisco sights.