How do i rid my sims 3 of all of its glitches?

My sims 3 has been acting up latley, sometimes when my people come back from vacation they dont load and they never come home, and you cant click on their squares. Another is, when they go to bed, like 10 second later they are on the other side of the room, bed made, still sleepy. My people don't get any sleep, its ridiculous. And also, its been freezing up a lot. Please help, all i want to do is play my game without having to evict people, send them back, copy them to my library and so on. Thanks.