Life may get very hard sometimes. Due to the fact that you need to be prepared for all possibilities. You can find very useful video tutorials about life hacks which will be very helpful in an emergency situation. For example, when you buy new shoes there will be little bags of humidity. Do not throw them away, save them. You can later use them in many emergency situations. For example, if you drop your phone to the water then you can put your phone in a ziplock and put many of humidity bags inside. It consumes the water and you can use your phone again.