Vinyl Composition Tile Cutter
If you are tiling the floor of a large kitchen or basement recreation area, rent a special cutter for vinyl tile. It has an L-shaped platform and measuring guides for accurate cuts. The sharp sliding cutter will slice through 9- or 12-inch tiles, and also cuts tiles diagonally.
Utility Knife
Practice using a straight-edged metal ruler and a utility knife before you start the job. Warm the tile with a heat gun before cutting till it is flexible in your two hands, then lay it down on a warm flat surface and cut with firm, steady pressure on the utility knife. Change the utility knife's blade frequently to keep from snagging or shredding the tile.
Minimize the Amount of Tile Cutting
Plan your tile layout on paper before you start placing tile on the floor. A well-planned layout starting in one corner helps you use mostly full-sized tiles. You may have to cut just a few near a doorway or against the lower cupboard base.
Source: www.DoItYourself.com