First and foremost important thing is that you should set a realistic goal that you can achieve through your abilities.
Evaluate the problems that might cause interruption in your smooth sailing towards achieving your target. Also try to plan ways of how you will deal such issues if they arise.
Make sure you have the abilities to tackle the issues as it is the only way through which you can achieve your target.
Sit alone in a comfortable place and visualise your goal in your mind. Think like you are dealing with things to achieve that goal. Stay positive in your thinking and take inspiration from the strength of your visualisation to achieve your goal.
Try to employ all of your five senses and contemplate the ways that can lead you towards your target. Try make things as realistic as possible as it is the basic requirement towards achieving realistic and measurable target.
Try to stir your all senses by focusing on the sounds around you. It can be the sound of shutting the door of a car or the roar of the car engine. Make your visualisation strong by focusing everything in your surroundings.
You can also smell different scents or can also see different scenes and try to visualise these things as much as you can. Also focus on the taste of the food which will enhance your sense of taste. These things seem nothing but they play a vital role in creating powerful visualisation.
You should also feel the excitement of something that goes into your favour or that makes you happy. For example buying a new car or moving into a new house.