The best way is to develop and follow a plan. Start with your goals in mind and then work backward to develop the plan. What steps are required to get you to the goals? Make the plan as detailed as possible.
Motivation is not an accident or something that someone else can give you. you are the only one with the power to motivate you. Motivation cannot be an external force, it must come from within as the natural.
We all carry a lot of baggage, thanks to our upbringing. The majority of people carry with them, an entire series of self-limiting beliefs that will absolutely stop, and hold them back from, success.