How can I decide what to make for dinner every night?

I am now in a living situation where I am no longer cooking for just myself. I have tried to get my man to help me think of ideas for what to cook all week, but he isn't much help. I was hoping that I can get some ideas from all the people who cook for their families every night--how do you decide what to make each night? Some days it is like I am wracking my brain thinking of ideas. Thanks!