Change your autopilot.
To change your life, you must change the way you think. A change of life begins with a change of mind. Every behaviour is motivated by a belief, and every action is prompted by an attitude. Be careful how you think; your life is shaped by your thoughts.
Imagine riding in a speedboat on a lake with an automatic pilot set to get east. If you decide to reverse and head west, you have two possible ways to change boat's direction. One way is to grab the steering wheel and physically force it to head in the west direction from where the autopilot is programmed to go. By sheer willpower you could overcome the pilot, but you would feel constant resistance. Your arms will eventually tire of the stress, you would let go of the steering wheel, and the boat would eventually head back east, the way it was internally programmed. This is what happens when you try to change your life with willpower: "I'll force myself to eat less.....rest well....quit being disorganise and late." Yes will power can produce short term change, but it creates constant internal stress because you haven't dealt with the root cause. The chance doesn't feel natural, so you give up, go off your diet, and quit exercising. You quickly revert to your old pattern. There is a better way, change your autopilot (the way you think).
There are two ways to doing this.
The first of this thinking is to stop thinking immature thought, which are self centered and self seeking. Stop thinking like a baby. Babies by nature are completely selfish. They think only of themselves and their own needs. They are incapable of giving; they can only receive. That is immature thinking. Unfortunately, many people never grow beyond that kind of thinking. The Bible says Selfish thinking is the source of sinful behaviour.
The second half of this thinking is to start thinking maturely, which focuses on others, not yourself alone.