There is a product on the market in the States that is amazing for removing
stickers. It is called UNDU, and it comes in a bottle with a small scraper attached. To use it, simply use the scraper to lift a corner of the sticker, squeeze a few drops out, and use the scraper to keep lifting the sticker. Any
glue residue can be wiped up with another drop or two and a paper towel.
I have used this on new purchases and it is also safe for scrapbooking -- it dries and won't damage your paper. The same company also makes a
candle wax remover, several bottles of which have been donated to my local church altar guild.