A good reminder shows up at the right time. Snoozing a reminder more than once is not a good sign. Create clever reminders, preferably out of your head.
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Group items on your to-do list by the context needed for its execution (where do you have to be, with whom, in what mental state, ...).
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Your system will definitely tend to chaos. Choose a specific day of your week where you spend some time (1 to 2h) refreshing it. Try not to get lost in execution. The aim is to restore some navigability and sense of control.
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Separating Action Points from potentially useful information is a major conceptual distinction of any efficient system. Apply it to your Notebook. Highlight Action points - specific actions to be done - that stand out in the middle of all info (make up a special symbol, or use a color if you like).
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Have 2 folders: 'PENDING' and 'ARCHIVE'. The first for items requiring your answer/action/attention. The second for potentially useful information. Now empty your inbox into those 2 folders. Get it to ZERO! Work @ 'PENDING' folder.
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Whatever guide system you use, it should somehow map your head. Practice being able to draw a global map of main activity, from a blank page, out of your head, in 4 min. Use 2-3 (max) activities per division. As you practice, main divisions get steady and it gets simpler and faster.
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