"No matter how hard I try, something always foils my workout schedule."

Get a plan and then grab a pen. People who have a process goal, such as a target number of weekly workouts, stick to their routines with significantly more success than those who focus on a big-picture outcome -- such as losing 20 pounds -- or go along without any specific goal, they also feel less stressed about squeezing in exercise.
Schedule your workout time just as you would a business meeting. "That way, when someone asks if you can meet at 5, you can honestly say, 'Sorry, I have an appointment; how about 4 instead?'"

Make it a priority like brushing your teeth!

Make it a Priority like brushing your teeth.