First: Always let your bag see the sun, don't keep it in the house and don't do outdoor sports. Without the moisture of the sun, your bag may be moldy, and there will be some odors that make you feel very uncomfortable, let alone carry it, so it may be a while. Take your love bag out for a sunbath and give it a little sunshine?
Second: try to avoid a lot of friction, in the process of use, it will inevitably encounter some wear and tear, here is not to say that it can not wear, but to try to reduce the damage caused by wear, to do less wear and more care . Try to avoid the place where the friction is large or the surface is not smooth. If you must use it, you should keep one more eye. You must not wear the frontal friction.
Third: Don't keep carrying it. If you are doing long-term exercise, it is best not to choose your shoulder bag for a long time. It must be that it is not good for your body to be carried for a long time. Try to carry it in an hour or two, then back it up, so that the combination of your work and rest can greatly extend the life of your backpack.