A quick post! There are loads of tips and tricks for any Apple Device, particular its OSes, but for now, these are the ones that I know of and constantly use.
iPhone and iPad
Tapping the Top Bar will scroll back up to the top of the screen.
Double tapping space bar when typing will give you fullstop.
Double clicking Home button while in lockscreen will pull up the Music play menu.
Double clicking Home button while in home screen will pull up the multitask bar at the bottom.
Pressing the On/Off button together with the Home button for a few seconds will start your iOS device – if it dies on you and pressing the on/off button no longer works. This is a must know if you don’t have access to Internet or anything to google about it. Otherwise if it really dies and this doesn’t work -> Take it to Apple’s Genius Bar.
Sliding two fingers from the middle of the keyboard outwards will split your keyboard in two, making it easier to type in landscape mode.
4 or 5 finger pinching the screen will bring it back to Home screen. I prefer this over actually pressing the Home button to avoid breaking it later, those Home buttons are the least durable.
4 finger swipe side ways while in an app will switch between your active apps.
4 finger swipe bottom to top will bring up the multitask bar.
Charging iPad Mini through your PC via USB actually works despite what it says on the screen, haven’t tried with the iPhone.
Do you use any of these? Do you know of any others?