Do: Do Your Research
If this is your first time working with tile, or a project of this scale, take the time beforehand and do your research. How much time will you need to set aside for this project, and is it realistic for your schedule? Which tile, tools and products will you need, and is it obtainable in your budget? Become well acquainted with each step of the process, so you can limit time troubleshooting later. Search for how-to videos and articles like this one, and ask questions at the hardware store until you feel confident enough to begin.
Do: Consider Backer Board
Before you begin tiling, check out the existing surface you'll be working on. If you are installing a backsplash behind a sink or area with moisture, you'll need to be sure you're working on water-resistant drywall or a rock-based board. If not, consider installing a tile backer board first.