Dogs HATE to be hugged (and I do it to mine multiple times a day - yikes!)...here are some other things we do that they dislike:
1. When we use words more than body language
2. Petting a dog's face or patting her head
3. Going for walks without time to explore and smell
4. Forcing your dog to interact with dogs or people she clearly doesn't like
See all 11 things here.