Someone needs some help today, and you should try to come to their rescue. Not only could acting selflessly today create a greater gain for you later on down the road, it will strengthen your relationship with this person and put them in your debt -- which could be extremely useful very soon. Your motivation doesn't have to be one hundred percent altruistic for it to be effective. It's okay to want there to be something in it for you. A win-win situation is a great situation.