After reading an article (or email) I hate having to scroll back up to the top. Just to read another. Thankfully Apple has solved this issue for us (in most applications).
It’s easy too. Simply touch the "Status Bar" at the very top of the screen (this is where the time is). When you’re in MobileSafari and the Mail application you will automatically scroll back up to the top of the page (or email).
This even works in some 3rd party applications from the App Store. So if you ever catch yourself scrolling back up. Try this little tip.