What techniques and tools do you use to keep yourself organized?

Time management skills are key.

Hi There, From Tools side: Computer (It has been innovated for our convenient, so we should get the use of it) like using Excel to manage all required follow ups, tasks and pending things to be completed.
and putting notes/reminders, also reading thru internet about all related things about time management which can support your knowledge accordingly.
From Technical side: Practicing to be punctuality that would help so much to carry on everything on the same rhythm, learning from every mistake that you may face in your life, prioritizing your time by solving the most critical things at first, also sharing the experience and learn from others (specially the experts who are around you).
Regards,

- Begin with the end in mind

- Doing first things first.

- Pay attention to the (important - not urgenet) tasks before they become urgent.

- Eliminate waste (non-importnat - non-urgent tasks)

I use organizer notes to organize my tasks, details ,notes and callings.
however,In most of my time I use my brain to store and organize things and let the organizer just for revision if I missed something