Most important thing for Computer users is a regular system backup. Mac users are really lucky to have Time Machine features which comes inbuilt with Mac. Time Machine which regularly take backup of your whole system to the External Drive and Even it will record how the system looked on the time and it can restored to the time which you want.

If you are a Windows users, Recently switched from Windows. Its really not that much hard to adopt Mac. Just spend a Week with Mac and you will able to do the best with Mac. Now i am writing this tutorial for the people who are really new to Mac. Its not like Windows by just tapping the Right click and selecting Format feature.