I would like to go to Hangzhou from Shanghai. What's the best way?

Since the Seventh heaven hotel is very close to Nanjing Road East Station, you can walk there to take subway line 2 to Shanghai Hongqiao Railway Station, then take bullet train or high speed train to Hangzhou. You can easily find bus from Hangzhou Railway Station to the West Lake, such as Y2 and Y7.
Well, as for the pagoda, do you meam Six Harmonies Pagoda or Leifeng Pogada? K808, K599, 504, or Tourism Bus No. 5 can take you to Leifeng Pogada, while bus Y1, Y2, Y3, K4, J5, Y6, Y7, Y9, K291, K504, K808, or 822/K822 can take you to Leifeng Pogada.