Quirks humanize your characters and can connect them to the reader more or simply add much needed interest to the story. Pay attention to weird things that can be used for this purpose. For example, I bought a container of Lysol wipes but were void of wipes when I opened it. What if someone stole them? It's a weird thing to do and why would someone? Pretend it wasn't a company glitch. Also, someone tried to steal a friend's doorbell. WTF? People are super strange/crazy so anything you make up might not be too unbelievable.