iOS6 comes with a great new feature you can use to password lock an app or only a part of the app so you can hand over your iPhone to other people without worrying they will do or find something you don't want.
To avoid using someone else's copyright protected images you aren't allowed to use for commercial or even personal use, Google Advanced Image Search has got you covered.
A real useful tutorial for the beginners where you will learn how to do a simple zoom in effect on a random text and them zoom out of it again in Adobe Premiere CS5.