SO TRUE! But be careful what you think about. Here's a suggestion: "Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things." Philippians 4:8
I love this. Mainly because others remember little things about you is because of an impression you made. Be a Beacon in sometimes darkness always. Even when you have your own darkness helping someone out of theirs will actually brighten yours.
As all great truths, this sounds so simple we are inclined to overlook it's earthshaking importance in OUR lives! Because OUR LIVES, OUR UNIVERSE, IS SHAPED BY OUR THOUGHTS AND OUR WORDS! WE needs to constantly be aware of this. The Wisdom of the Buddha.