Some people carry around a note pad, others email themselves tasks that need to get done. But if you want a simple program that will synchronize notes from your iPhone to your computer (and vice-versa), give Simplenote a try.
My email is my foundation for organization. If something needs to get done, I prefer to email myself and put the note in one of my folders. That said, there are times when I have jotted notes on my iPhone using the note program, and discover them approximately three months later.
With Simplenote, I could access those notes on computer, and might actually see them before they are irrelevant. Given my dedicated belief in the “empty inbox,” Simplenote might be more useful because I would jot down more notes (no concerns about filling my inbox with random thoughts that quickly get deleted).
If you are looking for an easier way to keep track of random thoughts, give Simplenote a shot.