While I was in year one in the university, a friend of mine told me to always go out with a pen and a notepad, to jot down any idea or thought that cross my mind.
Sometimes while walking down the road, you get flashes of ideas, maybe a design or something and you say to yourself, 'when I get home I will work on the idea'. And you get home not remembering anything, the idea just disappeared from your head.
For those of you that are into music, while taking your bath or driving your car a nice beat comes to your head and you have the perfect lyrics to go with it and you didn't write them down. There is a high chance that you might forget it when you get to the studio.
Make sure a pen and a notepad is with you at all times because the smallest pen is bigger and better than the biggest brain.