You seem to say that not being organised is a curse. I disagree, school teaches you to be organised, nobody teaches you to be creative. Organised people are consistent, reliable ; but creative people come up with better solutions and work faster IMO. Organisation is about following rules, creativity is about making them. Therefore organised people are centered on the what while creative people lean towards the why.
The easiest way I know to be organised is to divide everything into small tasks like SMART (simple, measurable, assignable, realistic, temporal) objectives, write them and set reminders. If you can create this, you will end up with a process to follow. That's basically what AGILE methods like scrum want you to do.
But I believe we can be more specific, what are your difficulties ? Do you have any example to provide ? How do you like to do things ?