Anyone has any suggestion on PREVENTING ear infections?

LO is 13 months and he never had an ear infection for the first year. But that was when we kept him home with a nanny. Now he started daycare 2 months ago and already got the 3rd ear infection! Ahhhh!

I really don't want to even contemplate putting tubes in. I heard way too many horror stories about it. I had maybe 1 ear infection when I was a baby, and my husband had none. That's because we were at home before preschool. It makes me feel like a bad mom putting my kid through this because I want the convenience of being able to work.

Anyone has any suggestions that prevents ear infections??? Doctor said we have to consider tubes if he gets more than 6-7 ear infections in a year.

Story sharing is welcomed too.....