I showed long time ago a tip how to remove labels from jars, but I have another tip. This tip works well if you need to remove stickers from furniture or from tile.
First try to scrape the surface of the sticker away if you can. Then spray the sticker with a lubricant, with something that you would use for hinges or for car parts. You can either scrape the most of the sticker out with a knife or with your finger nail. Or if there is very little of the sticker residue like I had just wiping firmly with a cloth will do the trick. Somehow the lubricant makes the sticker more brittle and also it allows you to get under the sticky surface easily.
Once you've got the sticky stuff out you can wipe the whole area with a regular cleaning product.
This lubricant removal trick works really well for those foamy double sided tapes that are sometimes used for attaching things on the walls. I very succesfully removed huge amounts of those from our kitchen tiles few years back.