help?

okay, so the only way i can get rid of the hair on my legs and other places is by shaving it off. i have a couple questions. first, i tend to miss a lot of spots and only notice later. how do you guys stop from missing spots? or minimize it at least. and second, how do you get your skin really smooth while still shaving? like mine kinda gets bumpy after i shave and idk what to do.

thanks sm!! :3