First of all define what success means to you, what are your haves and not haves in this definition of success. Now these haves and not haves are your targets to achieve. You've got yourself a goal in life, congratulations!
Now we have to set some parameters and come up with a strategy to achieve these goals. You have to follow this strategy and respect these parameters. Now comes DISCIPLINE in play. You need it in order to follow your strategy. To quote Mortimer J. Adler on discipline: "True freedom is impossible without a mind made free by discipline." That should hint you how important this discipline is in this journey. On a side note, I would recommend a short story "Memento Mori by Jonathan Nolan" it has some very strong words on discipline and how to stay focussed which is the next stop in this journey.
Staying focussed is a very crucial part here. Once you lose your focus, everything goes poof! Staying focussed and disciplined you now have to work hard and smart towards the execution of your plan. Along the way grab any opportunity that comes your way, learn at every step and most importantly maintain a receptive attitude.
And last but not the least keep believing in yourself, it's crucial for staying motivated. At the end of the road, when you've reached your destination and achieved "SUCCESS" it's time you give something back to the society, help those who are struggling just like you once were and make their journey easier.
Hope it helps and have a good day.
Thanks!