By R. Anthony Diaz |Asst. Features Editor| If you’re headed to San Francisco you don’t have to wear flowers in your hair, but I do recommend bringing a cardigan. Mark Twain was once quoted saying, “The coldest winter I ever spent was a summer in San Francisco." I don’t think he was joking, but don’t let this discourage you from visiting. I call this my favorite southwest city, because it's the only place aside from Phoenix that you could actually fly to at the spur of the moment for less than $100 each way. If you’re traveling within California, Southwest Airlines is almost always the way to go. If you do head here for a 36 hour getaway, remember that the best times to visit is … [Read more...] about Diaries of a Jet Setter: A guy’s guide to getting lost: San Fran