2) Try to get free press: For SyncPad (not technically a web app) we always tried to do things worth writing like that video with 40 iPads in drawing in sync (http://blog.mysyncpad.com/post/4293113601/syncpad-on-40-ipad...).
3) Care about your customers: You'd be surprise how quickly the word spread about your product if you offer awesome customer support.
2) Try to get free press: For SyncPad (not technically a web app) we always tried to do things worth writing like that video with 40 iPads in drawing in sync (http://blog.mysyncpad.com/post/4293113601/syncpad-on-40-ipad...).
3) Care about your customers: You'd be surprise how quickly the word spread about your product if you offer awesome customer support.