Tips for apps- backups- latest android

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http://forum.xda-developers.com – 4.1.2 current 4.2.2 Max I wish to update android. Can I do this safely if I just (un)rooted my device? Whatever the terminology is. (i just did it so I have superuser etc. im a complete mobile phone noob) What is the most easy way to make an complete backup of the entire phone? As in apps- settings-internal firmware etc. I wish to make a complete backup. What would be the easiest way to aquire apps? I found 4shared and blackmart but they are not as good as the playstore, as in searching, for with this you need to know already what you are searching. Well you can use playsto (HowTos)