Snack prep - what are your favorite snacks?

I'm trying to snack less but when I do snack, I want healthy and convenient snacks. I'd love some recommendations. I have tried several different things but they don't hold me over for long. So the most recent has been carrots and celery with hummus. It's not something I think I could bring to work, but I'm looking for snack ideas that are easy to bring to work as well.