"f you own an iPhone here is some info that may be helpful -- particularly the tip about iMessage," Jim Hamm writes. Here he explains:

"If you’ve ever filled your iPhone to capacity, you may have suddenly noticed a gray section of stored data titled “Other” in iTunes. What could this mysterious data be?
"Well, there could be a couple things that could be contributing to it, but the most likely culprits are your apps. More specifically, one culprit: iMessage. You’re probably not aware of this, but every time you send or receive a file within an iMessage — whether it’s photos or various documents — your iPhone stores that data. If you are like millions of other users who enjoy sending silly photos to friends and family (or inappropriate ones if you’re into that sort of thing), that data can accumulate very quickly over time.
"On the rare occasion, restoring the iOS on your iPhone can resolve this issue, but the less invasive solution is to locate problematic apps on your phone that could be taking up space.
"To free up that space, follow these instructions:

Make sure your phone and apps are synced in iTunes.
If possible, make sure you have backed up or copied off any documents or data you might need, as you will lose it. A lot of apps allow you to email documents and data.
On the phone, go to Settings/General/Usage. You should find a list of all the apps.
On the right hand side is a list of the total storage space each app is using, including the app itself. The list is also handily listed in descending order of size. If you tap on on one of the apps on the list, it shows you how much space is being used by documents and data. You also have the option to delete the app.
To delete the app, simply tap on “Delete App.” The app is deleted, and so is the data stored in the ‘other’ area. Repeat for other apps if necessary.
To re-install the app(s), plug it in to your iTunes and re-sync your phone. The app(s) are re-installed with no data taken up in the ‘Other’ area.

"If you want a visual representation of your data, the third party app iExplorer is very easy to use and available as a temporary demo. You can also buy it if you want."
http://www.macroplant.com/iexplorer/

   Thanks to Jim Hamm who writes, "Here are some comments about security in Safari from a member of a Mac forum I belong to. These are the settings he recommends. I’ve not tried or read about the last item in his list: FlashToHTML5. I’ll have to learn more about this, and why/if to use it.
   Safari - Block Pop-Up Windows
   Safari - Preferences - General - Open "safe" files after downloading (uncheck)
   Safari - Preferences - Autofill - Using info from my Address Book card (uncheck)
   Safari - Preferences - Autofill - User names and passwords (uncheck)
   Safari - Preferences - Security - Fraudulent sites (check)
   Safari - Preferences - Security - Location services (uncheck)
   Safari - Preferences - Security - Web content (uncheck all for most security, but check as you need capability)
   Safari - Preferences - Security - Accept cookies (check only "Only from sites I visit")
   Safari - Preferences - Security - Ask before sending a non-secure form from a secure website (check)
   Safari - Preferences - Extensions - AdBlock (add this extension to block most ad content)
   Safari - Preferences - Extensions - FlashToHTML5 (add this extension to convert Flash to HTML5 when possible)
   "The biggest setting to change is the Human Setting. Think about links before you click them. Hover over them to reveal their true destinations before clicking on them. Watch for non-secure (http://) links that ought to be secure (https://)--anything that deals with money, like banks, checkouts, etc. Look for the green secure/trusted indicator in the URL bar.
   "Watch for links that include multiple 'http' strings -- these initially look like they go to the first domain listed, but actually go to the last one listed (http://www.trustedbank.com.http://evil-domain.net/blah/blah). DON'T click these. If a bank asks you for your account login information in email, via a link sent in email, it's fraudulent. If clicking a link causes a 'Enter your system administrator password' prompt, think long and hard before typing it in. I think you get the idea."

iPhone's Mysterious "Other" Data

Security Settings for Safari