Summarize this article in one sentence.
Carpet tiles come in a variety of designs and types. Find a tile that will compliment the colors of your room. Also, there are traditionally two types of tile--those that come with a peel-off adhesive on the back and those that have no adhesive. The peel-off adhesive style is typically more expensive.  If you purchase the tile with no adhesive, you may also have to buy carpet glue or double-sided carpet tape. Select a carpet tile that blends in with the room’s style and colors, rather than a tile that stands out. To get the area of your floor, multiply the width by the length of the floor. If you have an irregularly sized floor, divide the floor into separate, measurable sections, then add the total square feet of each section together. Getting this figure will help you determine how many carpet tiles you'll need. When you purchase your tile, buy extra tile in case you make mistakes. Draw the sections that you want to carpet on a piece of paper. Arrange the tiles in your design to a style that you like. Drawing the layout before you lay the tiles will give you a general idea of how the tiles will look in the room. Each tile should have arrows on the back of it that help you determine which direction the tile is facing. Line your tiles up so that they are all facing in the same direction for a uniform design. Instead of facing all of your tiles in a single direction, alternate every other tile to face in a different direction. This will make your carpet tiles look unique. Try out different configurations and styles on your paper design before committing to a design.

Summary:
Choose a style of carpet tile. Measure the square footage of the floor that you want to cover. Draw a layout for your floor. Position your tiles in the same direction for a uniform design. Alternate your tiles for different designs.