I write about the things I do and the things I know about. Think about things you've done in your life, your habits... are they interesting? Does hubby drive you nuts? Are the kids out of control? Do you like long walks at night?
Just think about your life, your friends, or lack thereof, and pontificate on these kinds of things. Some people will read anything and do. And if you read some of the hubs, they aren't well written at all so you need not worry about competition. Just do it, as they say.
Write about something interesting from your childhood, a favourite teacher, or the teacher that you hated. How you pick out a dress. How you hate or love house work.
Get the old imagination ticking and write what comes into your mind. Ya never know wut's lurking there.