Here is Google Plus Tip #2
Here is a quick tip if you are a new hangouts. This little gem was originally bestowed upon me by Bobbi Jo Woods, if you want to have people be notified when you invite them to a hangout, simply create a circle with 24 or less people in it. When you invite that circle to a hangout, they will be notified and if you are connected with them via chat they will receive a chat invitation.
If you want to let more than 24 people know that you are inviting them to a hangout, it is easy, just create multiple hangout circles each with less than 24 in them and voila!