How to get to the new features of iOS 5 on iPhone

To get the camera icon on home screen

Double click on home button on iPhone

To take a picture, just press the "volume up" button on the left side of the iPhone.

Notification window

Slide/swipe down with your thumb from top bar(where it shows time, battery meter and network signals) once you are on the main page.

iCloud settings
Settings > iCloud  - Select the items you would like to be in the cloud

iCloud Storage plan upgrade

Settings > iCloud > Account > Storage Plan

Updating iOS automatically after iOs 5 update

Settings > General > Software Update

iTunes Wi-Fi Sync

Settings > General > iTunes Wi-Fi Sync > Sync Now

Keyboard Shortcuts

General > Keyboard > Turn  "." shortcut ON
To add a new Shortcut, tap, Add New Shortcut.

Accessibility
Settings > General > Accessiblity

Twitter settings on iOS5
Settings > Twitter > Sign in your twitter username and password and you can add multiple account

Private Browsing in Safari
Settings > Safari > Turn Private Browsing ON under Privacy

iMessage 
iMessage is an integrated feature in Messages, but make sure to turn it on inside the settings of Messages.
Settings > Messages> Turn iMessages ON

Read Receipts
Settings > Messages > Send Read Receipts option ON/ OFF

Creating Reading List
Open up a webpage in Safari
Click on the bookmark icon from the bottom, select Add to Reading List.

Opening/Retrieving Reading List
Click on the bookmark icon from safari("open book" icon). Select Reading List.