Follow along with the video below to see how to install our site as a web app on your home screen.
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You can back up your apps with apps like titanium backup or romtoolbox. When you've installed a new rom just download that one app and use it to restore the rest. If it's not there to restore then you're wiping too much. You only need to wipe data, cache, dalvik and system for installation of a new rom, and only cache and dalvik for updating a rom or installing a zip.
Wiping your internal is almost always uneccesary. Don't do it.
When you make a backup in recovery, it backs up your entire rom. Including all apps, data, contacts, etc... This is good to go back to in case something goes wrong but it won't help your new rom.
That's where titanium comes into play. It saves all that to your internal memory, so you can restore to your new rom. Making life easier for flashaholics like us. Lol