There are literally two steps you need to take, in order to get things done:
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Write down everything you need to do,
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Take each item off the list and do it.
Simple as that. You don't need a time management system, even if you feel that having a handy logical chart will make you more productive (more often than you'd like it won't).
The worst thing is having a process that doesn't improve anything. It's frustrating, and wasteful.
Take a piece of paper, write a task on it, then discard it when you're done. Satisfaction.