Discipline is mostly design
People who seem disciplined are rarely using more willpower than you. They have arranged their day so the right action is the easy one. The steps below are about making that arrangement.
1. Pick one thing
Trying to fix sleep, diet, work and fitness at once is the fastest way to fix nothing. Choose one habit, such as going to bed by 11 pm, and give it two to three weeks.
2. Make it small enough to do on your worst day
Discipline is tested on bad days, not good ones. A five-minute version that you always do is worth more than a one-hour version that you do twice.
3. Decide when and where, in advance
A fixed time removes the daily argument with yourself. Write it as an "if-then": "If it is 6.30 pm, then I put on my running shoes." Add an alarm so the decision is made for you.
4. Remove friction from the good habit and add it to the bad one
Lay out your gym clothes the night before. Keep the phone charging outside the bedroom. Small changes to the environment do more than motivation.
5. Track it where you can see it
What you measure, you tend to repeat. A habit tracker such as Jeevan shows your streak and your week, which turns an invisible effort into a visible record. Choose the days that match your life so rest days do not count as failures.
6. Plan for the miss
You will miss days. Decide now what you will do: "Never miss twice." One missed day is an exception, two is the start of a new habit.
7. Borrow other people's discipline
Join a group or a challenge. Seeing others show up makes it easier to do the same, and having someone notice when you do not is a powerful reason to start again. See habit challenges and habit tracking with friends.
A one-week starter plan: Day 1, choose one habit and set an alarm. Days 2 to 7, do the smallest version at the same time and tick it off. On day 8, raise the goal a little, but only if the first week felt easy.