An Avatar is an image you use to identify yourself on the internet. If you want them to be consistent, this can be a lot of work.
This page is a basic list of URLs I'll have to go to should I end up updating my avatar.
You have many different profiles on the internet and you're finding they're older images from when you set up those accounts. It feels like you don't have a single identity online.
Notice places on the internet that invite you to upload an avatar. Create a list of all the ones you remember and use this list to update all your avatars. Add to this list when you notice new websites that ask you to upload an avatar.
Where possible, register email addresses you control with Gravatar to reduce the overhead of managing lots of websites.
Review Avatars List update and update your avatar to your most recent picture.
Joining a New Company: Task list, hit the ground running.
Leaving a Company: Task list, leave it tidy.
Patterns List: A list of all patterns on this wiki.
Avatars List: A list of websites which store avatars.