Socializing your dog refers to providing him with positive experiences with new things. The best way to make sure that your dog has great experiences is to include things he loves (like food or toys) so he develops a positive association.
Remember that exposure doesn’t mean socialization. If your dog isn’t having a great time, you could do more harm than good. Dogs don’t just “get over”issues by themselves, so if your dog is shy, worried, or overly excited, leave the situation and work with a professional trainer who can help both your dog and you.
If your dog is having a blast and is happy and comfortable, you’re doing a great job of socializing him!