I don't usually post coding tips on here simply because there are so many other sites out there that do it so much better but this one I love because it is such a simple but effective little line of code.
As you may have noticed, I now have a scrolling "back to the top" arrow in the bottom right hand corner of my page. Once I'd got my arrow and saved it to photobucket all I needed to do was open up my template in Blogger (insert standard "Don't forget to Backup" warning here) and inserted this piece of code
<a style="position: fixed; bottom:10px; right:10px;" href="#" title="back to the top" ><img style="border: none;" src="paste your arrow image url here"/></a>
just above the <body> tag. Insert the url for your own arrow image and reword the title if you want. As the Meerkats would say "Simples!" Cue gratuitous photo of Sergei ;o)