Three things

I want to put in money, cell phone and camera. First, the money is very important when we go anywhere. We can use the money for eating, souvenir etc. Second, the cell phone is very useful, because we can call anytime and anyone. If you need help, you can call. If you miss someone, you can call. Finally camera is good for your recollection. If you want to remember some time, you can put in picture in your camera. I am not sure whether these are useful, but in my case I satisfy.