Did a little more tile on our tiny hall bathroom. One tip I learned long ago from reading instructions! ( good idea ) was to start one tile up from bottom by mounting a furring strip to wall making sure it is level and going up from there. Finish the bottom last. Also .... do not grout the corners . Instead use a tile caulk . You can get it in the same shade as your colored grout. Get one of those tile books they sell at the hardware stores.