Is it good or well? There, their, or they're? Some people don't have to think twice about using proper English, but for the rest of us it can get tricky and confusing. Whether you're writing or speaking, it's all too easy to fall prey to simple mistakes that will represent you in a less-than-desirable light-which can potentially cost you a job or put you in an embarrassing social situation. Avoiding complicated grammar rules, this guide sticks to the basics and makes it easy to get up and running on what you need to know to partake in successful everyday communication, no matter your audience or medium.