Clean the floor of dust and debris. This ensures the tiled surface will be level.
Check the manufacturer's instructions for tile installation before purchasing or beginning tile installation.
Snap an additional chalk line the width of a tile out from each wall. This will help keep the tile placement perfectly straight. Continue laying out tiles and spacers until placement is correct.
Use a self-mix thin-set mortar for the tile installation. Pour just about an entire bag of the dry mixture into a large bucket. Add just enough water to get the dry mixture wet, and begin mixing. Continue to mix until the texture is creamy. Then let the mortar stand for about 10 minutes to get tacky.
When the mortar is ready, begin working on one section of the floor. Spread the mixture on a 2'x2' section of the floor and use a notched trowel to obtain an even layer of mortar. Work in small sections to keep the mortar from drying before the tile is in position.
Continue the process, using the chalk line as a guide and placing spacers between each tile to ensure uniform distance between the tiles. When all the tile work is complete, allow the tiles to dry in place for several days before grouting.