I want to build and deploy apps to office 365 preview site using visual studio 2012. Can any one point me some good help links? I have office/sharepoint templates installed in vs2012.
Here you can find a nice tutorial Introducing “Napa” - Office 365 Development Tools
Also msdn contains some nice training video's developing Sharepoint 2013
This wil help you get started.
Here is a great link to get you started:
You can also find many other resources just by searching with the keywords in your question here.