About.com states that the best way to clean a laminate floor is to dry-mop it to remove dirt, spray it with a bit of water and vinegar, and then mop it with a microfiber cloth. Using a traditional mop can damage the laminate by causing the panels to swell.
There are also laminate cleaners that can be purchased specifically to clean laminate floors like Pergo, but even these should be used with caution. Using too much cleaner leaves a soapy residue, and just as with the homemade cleaning mixture, using too much water causes damage. Buffing the floor with a clean microfiber cloth polishes it, although this is optional.