Give them a link back to the top of the page from the bottom and, depending on the length, you might provide several links to the top throughout the page. If you have subsections on the page, you can provide links from the top directly to the subsections. When a visitor requests a page from the server that houses your site, the page has to be downloaded from the server to the visitor's computer. A usable page downloads quickly so the visitor can read the valuable information it contains. This should be as obvious as having your phone number on this quickly downloaded page.
Pictures are the major speed bumps.
They slow down the downloading. Most of these pictures likely aren't worth the wait. Think twice about every single picture on the page and what purpose it serves. Make sure each image is as compressed and small as possible which probably means finding some professional help. Graphics must be optimized for proper Web display and this usually requires image editing software.