Probably, the tips I use the most is the screenshot! Just hold the power button on the top, while you press the Home button. This is great for saving a webpage that has information you want to see later. The image appears in your camera roll.
1. Quickly get to the first Home screen
Say, like me, you’ve gone a bit wild on the App Store and currently have a large number of apps installed. I have 101 apps, which means 7 Home screens to flick through. Your most important apps are on the first screen, right? Say you’re currently on screen 7, and want to get to the first screen. Simply click the Home button to jump there. Nice!
2. Flip between pages by tapping
Many iPhone apps feature a paging system with dots at the bottom of the screen, such as:
The Home screen
Safari
Weather
You probably know that you can flip between pages in these apps by swiping left or right across the screen. As an alternative, you can also tap the areas either side of the row of dots at the bottom of the screen:
(I find that, with a bit of practice, tapping is slightly quicker than swiping, but your mileage may vary.)
via 15 secret iPhone tips and tricks — Reality Distortion: Macs, Mac OS X, and Apple stuff.