I've made a few quid here and there from some semi-pro photography. While 'photo corners' are the traditional way of mounting pictures in an album, every photographer I know only uses one product: "3M Photo Mount". It's pH neutral (which means it's suitable for archive material) and comes in an aerosol.
The easiest way to use it is to place each print face down on a sheet of newspaper. (Use a fresh sheet of newspaper for each print). Spray the back of the print, ensuring that the spray goes slightly beyond the edge of the print. Carefully lift the print and position it in the album. (If you don't get the print properly aligned straight away, it doesn't matter because you can reposition the print before the adhesive dries).
3M Photo Mount should be available from any photographic shop. It's also sold by some stationers. Failing that, you can always buy online. Here's one site I found but there'll be plenty of others:
http://www.internet-business-supplies.co.uk/mm5/merchant .mvc?Screen=PROD&Store_Code=Office-Supplies&Prod uct_Code=043029
Chris