Hi i need to create a universal application from scratch.are they any standards or precautions to be taken into consideration while starting a application.Can any one please steer me to some nice blogs or tutorials so that i can begin with it.Thanks in advance.
A lot of the tutorials that are out there are really for porting applications from iPhone to Universal style apps.
I'd start here:
"iOS App Programming Guide - Universal Apps"
This is useful as a style guide:
"iOS Human Interface Guidelines"
As well as these specific iOS controls that are useful:
The UIPopoverController in particular is what you'll need to wrap things in like the image picker.
If there's anything else ask in comments and I can update.