Updated: June 16th, 2015
Sometimes you don’t want to click many times to reach the destination. I decided to make a list of the ones I could find. Bookmarking some of them will help you, when you don't remember how to get to them or to get there faster. Bookmark your favourites.
Home page plus.google.com
Your profile plus.google.com/me
Your circles plus.google.com/circles
Your followers plus.google.com/people/haveyou
Want to know who added you, but you did not add yet?
Your pages (owner) plus.google.com/dashboard
Your (privacy) settings plus.google.com/settings
Set age and country restrictions to your content https://plus.google.com/settings/audience
Your subscriptions plus.google.com/up/subscribe (hold control key when clicking on this one as it needs to open in a separate window)
Old photos (G+ photos)
All your photos plus.google.com/photos/yourphotos
What’s hot plus.google.com/explore
Hangouts on Air (to watch) plus.google.com/hangouts/onair
Hangouts that you have been invited to plus.google.com/hangouts/active
Manage apps plus.google.com/apps
Your old +1s in G+ plus.google.com/apps/activities
Your +1s in websites plus.google.com/me/plusones
From your posts plus.google.com/notifications/myposts
From others’ posts plus.google.com/notifications/otherposts
From mentions plus.google.com/stream/mentions
Google policy http://www.google.com/+/policy/content.html
Google account settings https://myaccount.google.com/
Sign out of Google account https://accounts.google.com/logout
Learn about safety www.google.com/+/safety/
Devices you are logged on www.google.com/settings/security/activity
Learn more www.google.com/+/learnmore/
Send Feedback https://support.google.com/plus/answer/1678224
Help pages https://support.google.com/plus
Official G+ Help community
New Google photos: (not in G+)
Shared links photos.google.com/shared
Mobile access photos.google.com/apps
Are you looking at them in YouTube or Google Plus? I don't know much about YouTube.
You need to be logged into your Google account to be able to comment on videos.
And the account needs to be linked to Google+. So if you are logged in as John Smith and you decided to delete John Smith Google+ profile, then you can not comment.
For YouTube help go to