I have give away facts I'm willing to share at work. I share things that I don't really care about but people feel like they know me better. Examples are things like I baked cookies this weekend, we went to the balloon festival, I'm loving the cooler weather so the dog and I can walk after work. None of those things really tell you much about me other then I like to bake, I do things with other people and I have a dog. Those are things I'm fine with co workers knowing. If they pry for more info I change the subject and ask about them. Most folks love to talk about themselves and don't have great boundaries. Ask about pets, children, favorite restaurants. Give a tiny bit to lend credence to your question like I love trying new restaurants, which local restaurant is your favorite? Let them talk for a few and then politely state gotta finish up this report and walk off. Now you are friendly but a hard worker and if they think they know a bit about you they will leave you alone.