Click on a location to layer several maps over a basemap to view changes over time. Maps are dated until 2006 and are available in several scales. This products is great for novice users or where you don't need current maps and are only viewing a limited area and don't need the entire maps.
The latest version of TopoView includes both current and historical maps and is full of enhancements based on hundreds of your comments and suggestions. It includes scales from 24K to 250K. Maps can be downloaded as GeoPDF, GeoTIFF, JPEG, KMZ.
Download a list of historic and current topographic maps including revision years. This site is text based and includes scales other USGS sites do not like and other Departments like NOAA's Ocean Survey.
National Geographic has built an easy to use web interface that allows anyone to quickly find any quad in the country for downloading and printing. Each quad has been pre-processed to print on a standard home, letter size printer. These are the same quads that were printed by USGS for decades on 22 x 27 inch paper but are now available in multi-page PDFs that can be printed just about anywhere. They are pre-packaged using the standard 7.5 minute, 1:24,000 base but with some twists:
Zoom into your area of interest or use the search box to look for a Quad. Click on the red pointers and then double click on the image in the pop up box to download the multi-page PDF
Page 1 is an overview map showing the Quad in context
Pages 2 through 5 are the standard USGS Quads cut in quarters to fit on standard printers