I want to restore as new to get the 3.2g of other off my phone can I do this and get all my saved data from my games back?
you will more than likely lose your saved game data.
I'm not having major issues or bad battery life but I have carried my files all the way for my iPhone 3GS and figured it can't hurt. Rene says he restore to new all the time but does that mean you just lose all your app data?
That depends on the app. For instance, Evernote, Dropbox, etcetera all save your data online. Password apps like DataVault allows you to save your data on the device, online via Dropbox and iCloud as well as to a computer.
My angry birds files are not all the important but I use password keeper and a fuel logger and thing like that where I want to keep my data so any help would be great. Thanks
I'm sure the password keeper app has a setting that will allow you to save your data to a computer or at least on the cloud somewhere. As for fuel logger, I don't know anything about that app so I recommend that you comb through its options/preferences for an ability to save to the cloud or to a computer. Now having said all of that, iTunes will back up the following:
Contacts* and Contact Favorites (regularly sync contacts to a computer or cloud service such as iCloud to back them up).
App Store Application data including in-app purchases (except the Application itself, its tmp and Caches folder).
Application settings, preferences, and data, including documents.
Autofill for webpages.
CalDAV and subscribed calendar accounts.
Camera Roll (Photos, screenshots, images saved, and videos taken. Videos greater than 2 GB are backed up with iOS 4.0 and later.)
Note: For devices without a camera, Camera Roll is called Saved Photos.
Game Center account.
Home screen arrangement.
Keychain (this includes email account passwords, Wi-Fi passwords, and passwords you enter into websites and some other applications. If you encrypt the backup with iOS 4 and later, you can transfer the keychain information to the new device. With an unencrypted backup, you can restore the keychain only to the same iOS device. If you are restoring to a new device with an unencrypted backup, you will need to enter these passwords again.)
List of External Sync Sources (Mobile Me, Exchange ActiveSync).
Location service preferences for apps and websites you have allowed to use your location.
Mail accounts (mail messages are not backed up).
Managed Configurations/Profiles. When restoring a backup to a different device, all settings related to the configuration profiles will not be restored (accounts, restrictions, or anything else that can be specified through a configuration profile). Note that accounts and settings that are not associated with a configuration profile will still be restored.
Map bookmarks, recent searches, and the current location displayed in Maps.
Microsoft Exchange account configurations.
Network settings (saved Wi-Fi hotspots, VPN settings, network preferences).
Nike + iPod saved workouts and settings.
Offline web application cache/database.
Paired Bluetooth devices (which can only be used if restored to the same phone that did the backup).
Safari bookmarks, cookies, history, offline data, and currently open pages.
Saved suggestion corrections (these are saved automatically as you reject suggested corrections).
Messages (iMessage and carrier SMS or MMS pictures and videos).
Trusted hosts that have certificates that cannot be verified.
Voicemail token. (This is not the voicemail password, but is used for validation when connecting. This is only restored to a phone with the same phone number on the SIM card).
YouTube bookmarks and history.
* Your contacts are part of the backup to preserve recent calls and favorites lists. Back up your contacts to a supported personal information manager (PIM), iCloud, or another cloud-based service to avoid any potential contact data loss.