Tips for Google+

I've been answering a lot of Google+ questions and I wanted to write up some tips for friends. If you spot an inaccuracy let me know and I'll update this.

Circles:

1. If someone isn't in one of your circles they won't get any of your posts except posts marked Public or maybe Extended Circles (friends of friends).
2. Other people can add you to their circles and you'll get their posts under Incoming. They still won't get your posts until you add them to a circle and write to that circle.
3. You can add a specific person to any post the same way you set circles. Just start typing their name.
4. If you post to a single person (no circles) you're writing them a DM/Message/Email.
5. You can mention someone in a post by typing @TheirName or +TheirName. Using the @ will list people in your circles first, using + searches all of Google+.
6. Look for the +Person link in a gray box to make sure their name is linked correctly in the post.
7. If you do a @mention and that person isn't on Google+ yet it'll just enter their name (no link, no gray box).
8. You can have people in multiple circles.
9. Only people in the original circle you posted to can comment.
10. You can disable resharing and comments under the post's dropdown triangle.
11. If you add someone to your Blocked circle you become invisible to that person.

Photos:

1. You need to put the Google+ app on your Android phone to do Instant Uploads. Enable Instant Upload in the app's Settings.
2. Previous photos and movies on your phone won't be uploaded. Only new photos & movies.
3. All Instant Upload photos/movies go to a Private Picasa album only you can see.
4. Once enabled all photos/video you take on your phone from any app will be auto-uploaded.
5. Movies only auto-upload on a wifi connection (if they're longer than 10 seconds).
6. You can share any photos/movies by clicking the photo/movie icons at the bottom of the status update section in Google+.
7. The photo/movie buttons in the Google+ status update bar also let you upload from your computer, or attach Youtube videos.
8. Tagging someone in a photo notifies that person and adds them to the list of people that can see that album.
9. You can change which people/circles can view and comment on an album. Go to Photos>Your Albums>Visible To

Hangouts:

1. You can click video/audio on and off. You can still participate in the hangout without video/audio - there's a chat box alongside the video feeds.
2. Your video feed won't become the main feed (you won't be talking to yourself).
3. Whoever is speaking the loudest becomes the main feed.
4. You can click on/off any of the smaller video thumbnails to stick that person as the main feed.
5. When you initiate a hangout you can set what circles you want the hangout to be visible to. Only those people can see it and join.