If you are a golfer like me, chances are you wish you had an extra shoe lace, a band aid or an aspirin when you were on the course.  Here is what I keep in a side pocket of my golf bag in a sandwich-size zip lock bag for those "emergencies": 

Band aids , a small roll of adhesive tape, aspirin, a decongestive, extra spikes for your shoes, a key to tighten the spikes, extra set of shoe laces, a small package of Kleenex (you never know when the restroom is out or you need to use the woods), suntan lotion (spf 15+), some bug repellant, a travel size bottle of hand cleaner (to clean your hands of fertilizer or dirt before eating the hotdog you just bought from the cart girl), and a few extra bucks (to pay for that hot dog).  I also keep a shoe horn and an extra pair of socks in my golf shoe carry bag.  You may have all this stuff in your bag already, but by keeping it all together in one spot can help you enjoy your round of golf even more.