I know most people prefer Titanium Backup, or Helium, but this one is my personal favorite, backup of apps, app data, and phone data (contacts, messages, ringtones..) is easy and straight forward, with cloud backup. It just works!
So you have new ROM, you are rooted. This app will save you time, nerves and battery. Hibernate apps that start randomly, or on boot, apps that work in background, and use up memory and precious battery juice.