The portable memory bank!!! Its amazing, i never realized how many good ideas come up during the day and get lost in the "noise".
For anyone who hasnt tried it, stop being lazy and do so! Just after the first day i realized the many adjustments i can make to increase the quality of my life.
p.s.- i had this idea a long time ago to walk around with a pen and notebook, but i thought it was silly after all "my mind is just wandering" (low self-esteem??). It took Win's explanation of the first law of behavorial pyscology.