Here are some tips on parking. They're for Los Angeles but most of them should apply anywhere.
I'll add one: For a while in recent months, I was going to Physical Therapy twice a week at a place where metered street parking was the only option. In that area, streets were cleaned Monday and Tuesday mornings. You couldn't park on one side of the street on Monday before Noon and you couldn't park on the other side of the street on Tuesday before noon. That halved the number of available spaces during those hours…so I learned to not make appointments during those hours. And if I made the appointment for Noon either day or even 12:15, I got there just as half the parking spaces in the area were open and available.