Time Macine Program on the Mac is the easiest way to backup your entire Mac.
So Why should I use Time Machine?
Well if your machine crashes it makes it a walk in the Park you get all your important stuff back.
Time Machine can be accesed in different places like your System Preferences under the Apple Menu in the top left corner of the Display.
Below is a picture of the Time Machine Control Panel.
Select your backup drive and Time Machine will start Automatically.
As you can see here the last time Machine backup attempt didn't run because the external Hard Drive or Time Capsule was not connected..
The Time Machine Schedule can be changed in ther Terminal Program by typing the following
sudo defaults write /System/Library/LaunchDaemons/com.apple.backupd-auto StartInterval -int 18000
The time is in seconds so 18000 is 5 hours
Thanks and remember to backup cause Hard Drives WILL fail.