Start from small steps
If you want to do a 10-km run every day and then go for swimming plus cycling, chances are you will never be able to shed the extra weight and will drop out of your routine. Start from small steps. Gradually make your way up the routine. Start from a few minutes every day and then slowly build your routine. This way, your body will be able to respond better to the new routine. Even if you want to change any other routine, for example like quitting smoking or soda, you will have to cut it down gradually. Leaving them altogether one day will leave you craving for more and eventually you will get back on the routine.
Do not lose momentum
It is very important that once you get into the act, do not lose momentum. This means you need to keep going at it every day. If you have started a new workout regime, make sure you do it every day just so that it becomes a part of your normal routine. If you have cut on all kinds of junk food to eat healthy, make sure you do not take one single bite because then you will crave for more and will eventually get back to it.
Making your new habit a part of your every day routine is very important. If you want to go for a jog early in the morning every day, getting out of bed can be quite a hassle. A better idea is, sleep with your tracksuit on and keep your sneakers nearby. This way, when you get up in the morning, you will know that this is something you need to do. If you want to quit on junk food, make sure you keep eating healthy. Prepare your meals in advance so that you never end up ordering junk food.
Make yourself accountable
Make a routine where you have to hold yourself accountable if you break your new routine or habit. This way, you will know that you do not have a chance of escaping punishment even if you drop your habit for one day. Skipping the gym/jogging for one day or eating junk food for a meal will ruin your habits. A good idea will be to pay a fine to someone you know every time you make a violation.