Traveling in San Francisco

San Francisco is a beautiful city that is famous for it's picturesque neighborhoods, liberal character, and stunning location on the bay. Some people describe San Francisco as the United State's most "European City." This title most likely comes from its compact development and its easy walkability. It also has no shortage of parks and public spaces where you can pass some time. The city sits on the end of a peninsula and offers stunning views of the blue bay, rolling green hills, and the striking Golden Gate Bridge.
San Francisco's climate is notoriously cool and foggy. The winters are damp while the summers are dryer but surprisingly chilly. Throughout the course of one day you can expect a variety of weather changes. Summer mornings often start with fog. Afternoons are warmer, but the chill and fog return again by the late afternoon. Winter is the rainy season, but temperatures are milder and sunny days may even have a warmer temperature than during the summer. Fall is a great time to visit because the fog is not a frequent and the rains have not yet arrived. San Francisco also has many microclimates that are created by the city's hills and coastal setting. It is not uncommon for one neighborhood to be experiencing dramatically different weather than another.
Be warned, summer days in San Francisco can get cold! (May to September) Pants and a light jacket are often required. While it doesn't actually rain very much, the fog affects the weather and brings in cold air from the sea, and you will get cold whether you believe it or not. The locals will be dressed for it, but you'll be chilly!
Neighborhoods & Around
San Francisco is a city of neighborhoods. Each has its own character and personality.
Union Square and the Financial Districts are notable with tourists as this is where you'll find many hotels, shopping areas, and some entertainment. Fisherman's Wharf is also a popular area with tourists. It sits on the waterfront and has many famous sights such as Pier 39 and Ghirardelli Square. Nob Hill is a notoriously upscale neighborhood, and from the top of the hill you can get great views of the bay and the financial district. Haight Ashbury is the crux of the "hippie" movement, although today it is little more than a tourist attraction along as well as a nice spot to grab some food and drinks. Golden Gate Park is also a wonderful place to explore, and Chinatown is a fun place to walk around and try dim sum dumplings.
Other neighborhoods that tourists frequent include North Beach, Castro, and Twin Peaks.
I took the Muni or the city bus whenever I could since they are cheaper than taxis and tour buses. I think you could also save by eating at some of the cheaper fast-food places in the mall or away from the tourist areas.