All Satan needs is a toe in your door to sneak in and wreak havoc in your life.  Just one small chink in you armor is all he needs and he willl start creating doubt and play on your sensibilities.  You make one small excuse and he jumps on it and makes it easier to make yet another excuse until he makes a change in your life that becomes a habit.  For example, you are tired and make an excuse to sleep in rather than get up and go to church and worship God.  Then the next time it becomes a little easier  and then the next until you have made a total change and several weeks have gone by and you are feeling less guilty to sleep in and miss worship.  Don't let the devil get a toe in your door and rob you of your worship time!  Jump up and give Jesus his due and praise that he so richly deserves.  Tell the devil to go away and leave you alone and that you belong to God!