If you are like me, you use the native notes app on your iPhone and iPad quite a lot. It's extremely handy for jotting down ideas, and works well with Siri too, so you can just tell your phone to make a note about something while you are driving or otherwise to busy to type.
Sometimes you may be at your computer and need to access those notes, but can't be bothered to go looking for your phone.
Here's what you can do.
Ensure iCloud is up and running on your iPhone and iPad.
Under the settings for iCloud on your device, ensure notes is turned ON.
On your Mac or PC go to icloud.com and log in with your Apple ID.
Select Notes in the left margin.
I find I don't need to use this function all that often, but it sure is handy when I need it. For Mac users, when the new Mac OS X Mountain Lion comes out you will have a note app that will synchronise even easier with your iPhone and iPad.