Know Before You Go
Delft has a small medieval city center which is really not car friendly. Use a parking garage or better, public transport. It is an 8 minute walk from the train station or you can take Tram 1.
Don't forget to get your free cup of coffee or tea at Stads-Koffyhuis (Oude Delft 133) or Bakker Suikerbuik (Hippolytusbuurt 24) when you go into the town center.