So here ar some of the ones I found helpful for more go to http://shopping.yahoo.com/blogs/digital-crave/25-more-awesome-iphone-tips-tricks-202159530.html
- Turn on the “Emoji” (emotions) keyboard: Ever notice how some of your friends have cute little emoticons in their emails or text messages. You know, like a little yellow face with hearts for eyes, teddy bears, Christmas trees, and so on? By default, your iPhone doesn’t give you access to these emotions and other graphics — but it is stored on your phone and ready when you are. To enable the Emoji keyboard, go to Settings, then General and finally Keyboard. Once inside, tap International Keyboards and “add” new keyboard. Select “Emoji.” Now, when typing an email or text, tap the globe key near the space bar for these new options. Tap it again to return back to English.
- Close open apps to save battery life: Make sure apps you’re no longer using are not open and draining the battery. Do this by double-tapping the Home button and you’ll see all the recently used apps running in the background along the bottom of your phone — such as a GPS app you no longer need because you’ve reached your destination. Press and hold an icon and they’ll all jiggle, which means you can tap the X to close the open apps at the bottom of your iPhone.
- Lock the screen orientation: Does it drive you nuts to have the iPhone screen flip around when you rotate the phone? You can prevent this from happening if you have no desire to swap between portrait and landscape view. Simply choose the orientation you prefer by tilting the device and then double-click the Home button. This will bring up the multitasking interface at the bottom of the iPhone. Now swipe from left to right and you’ll see a “portrait orientation lock” icon at the very left of this string of apps (it has a circular arrow on the icon). Tap it once to lock your orientation and you’ll see a padlock appear. Turn it off by tapping it again.
- Manage your camera time: Here’s another tip when using the camera. Unless you’re running out of room, never delete unwanted photos from your iPhone when you’re out. Why? You really don’t know what the photo looks like until you see it much bigger on a computer monitor (it may be better than you think and/or fixable with software). Plus, spending time deleting photos on your smartphone right after you took them means you might miss an awesome shot because you’re not paying attention. And finally, deleting photos and videos off your iPhone unnecessarily drains the battery.
- Quickly add a calendar entry: You might’ve noticed when reading an email in the Mail app it’ll automatically underline anything related to date and time. For example, you’re typing to your buddy something like “Don’t forget we’re hooking up for drinks on Friday afternoon.” iPhone will detect this is a date or time and will convert it to a link — your friend will see “on Friday afternoon” underlined and in blue — and they could tap the link to add the event to their calendar.
- Delete your memory-hogging apps: Beginning with the iOS 5 update, you can see how much space your apps are taking up on your iPhone and delete them from your device — even a bunch at once. To do this, tap Settings, followed by General and finally, Usage. From here you’ll see a list of all your apps and their file size. If you see that Max Payne game is 1.3 Gigabytes and you don’t play it anymore, tap to delete it. You can always reinstall it later of via iCloud, App Store or your computer
- Take a photo with your headphone cord: Now that you can use the volume up or down buttons to snap a photo, steady your hand while framing up the photo and when you’re ready to take the picture, press the button on the cord so it won’t shake the iPhone. Voila!
- Revive a frozen iPhone: If your smartphone freezes on you and pressing the Sleep/Wake button on top of the device doesn’t do anything, don’t panic. Instead, press and hold the Home button and the Sleep/Wake button at the same time. You’ll be prompted to swipe the “Slide to Power Off” tab. This so-called “hard reset” resuscitates the frozen iPhone. You’ll first need to wait through a full shut down and restart.
- Prolong your battery: Speaking of the battery, here’s how to squeeze more life out of your iPhonebetween charges. Turn down the brightness of your screen, turn off wireless radios you don’t use (such as GPS, Wi-Fi or Bluetooth) and reduce the number of apps with info you have “pushed” to your phone. Also, make sure you lock it before putting in your pocket, purse or backpack or else it could turn on and drain the battery.