7. As Kenny Rogers sang, "You better count your money" and in decorating there is NO greater mistake than underestimating what things will cost. Figure out what you can spend and be realistic! If you are remodeling it will ALWAYS cost more than you think, so add a buffer to cover those unexpected costs. Make a list of your wants and needs this will help you determine your budget. Also, decide on what approach you want to take, i.e. do everything at once ,one room at a time, or a piece at a time.