In my opinion the easiest way is fast edit. You can not only edit from the buttom (and top) of the post but also from everywhere. Especially when you want to change a small part of a long post, you don’t have to scroll anywhere. I sometimes even mark just one common word (or even just a letter) and take advantage of the effect that this opens the normal edit, because fast edit cannot tell where that word is. So this is my preferred way to the normal edit:
