If you don't want to read a manual about your Ipod Touch, you might be missing out...I was.
Here are a few things I have learned, or might not be that obvious.
Double click the home button to get music controls even if you are in another application.
Push the home button and the sleep button at the same time to take a picture of the current screen.
Push and hold any of the squares (apps) on the home screen and they will start to shake. Now you can drag them around and reorganize, even the four at the bottom. You can also delete apps you have installed by pressing the x in the top left of the app square.
You can delete some apps from the home screen you might not want like Youtube (I live in China and its blocked anyway) by restricting it under settings> general > restrictions
Push the sleep button (thin button at the top) to make it sleep, that way you don't have to wait for a minute or however long you have it set. (This is under general settings> autolock