When you see the 'Reader' icon in the menubar on iPhone or iPad, tap it to get a beautifully-formatted enlarged version of the webpage you are viewing, with no distracting adverts. Once viewing it in Reader mode, you have a lot of options including increasing or reducing the font size and sending the whole article by email.
On the iPhone, where you are viewing a lot of data (say in Contacts) or at the end of a long webpage in Safari, tap the time display at the top of the screen to rapidly scroll right to the top of the page.