Backup in full before ROM flashing

[asdf12321]

Hello guys.
It's me yet again seeking wisdom and advice.
What's the best way to backup all of my android so that when I wipe and flash a ROM I can restore it to as close as it was before as possible?
I ask because some of you switch roms often, while I seldomly dare to wipe because that means spending several hours restoring my apps, data, config for each app, phone and system settings and homescreens to they were before.

 

[breadnatty08]

You need to create a Nandroid backup in your custom recovery. Which phone are you using?

 

[asdf12321]

You need to create a Nandroid backup in your custom recovery. Which phone are you using?

I'm using a Galaxy Nexus.
To the best of my knowledge, nandroid backups restore EVERYTHING, and therefore will also restore the ROM I flashed out of. What I need is something that will copy everything from my current ROM to a new one, if that makes sense.

 

[breadnatty08]

I'm using a Galaxy Nexus.
To the best of my knowledge, nandroid backups restore EVERYTHING, and therefore will also restore the ROM I flashed out of. What I need is something that will copy everything from my current ROM to a new one, if that makes sense.

Ah, so it sounds like you want to backup and restore all data to the new one. Generally, when moving to a new ROM, you want to wipe all data/cache. One of the methods of backing up and restoring that data is to use Titanium Backup. I'm not overly familiar with the app since I don't use it, but most who do love it for that very reason.