Need ADVICE on iPhone shopping style app
Firstly, let me apologise for the broad scope of the following question:

I need to create an app, like the amazon app or any other app which deals with selling items and is just an (smartphone) extension of their core business(internet sales). Now I'm sure given enough time I could cobble something together that works, but if I'm going to do this I want to do it as right as possible the first time :)

My question is where do I start? (sorry, that was the broad part) But really I'm looking for as much advice as possible, I don't want anyone to write the code for me, but I've read some books now and my biggest problem is deciding on an approach to this, i.e. what I should be using for identification, loading in the stock, handling the actual orders the general things you come across when buying online.

So my real question, is more a cry for advice on which techniques I should be using for the different parts(mentioned above), things to read that can help me, tutorials, books etc. anything you can think of relevant to helping me sleep at night :)

Many, many thanks in advance for any help I can get

as a note, I should mention I already have the following books:

 - iOS Programming the Big Nerd Ranch Guide 
 - iOS 5 Programming CookBook
 - Beginning iOS Development 
 - Programming in Objective-C

Kind Regards
B
Need ADVICE on iPhone shopping style app
===

Firstly, let me apologise for the broad scope of the following question:

I need to create an app, like the amazon app or any other app which deals with selling items and is just an (smartphone) extension of their core business(internet sales). Now I'm sure given enough time I could cobble something together that works, but if I'm going to do this I want to do it as right as possible the first time :)

My question is where do I start? (sorry, that was the broad part) But really I'm looking for as much advice as possible, I don't want anyone to write the code for me, but I've read some books now and my biggest problem is deciding on an approach to this, i.e. what I should be using for identification, loading in the stock, handling the actual orders the general things you come across when buying online.

So my real question, is more a cry for advice on which techniques I should be using for the different parts(mentioned above), things to read that can help me, tutorials, books etc. anything you can think of relevant to helping me sleep at night :)

Many, many thanks in advance for any help I can get

as a note, I should mention I already have the following books:

 - iOS Programming the Big Nerd Ranch Guide 
 - iOS 5 Programming CookBook
 - Beginning iOS Development 
 - Programming in Objective-C

Kind Regards
B