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- Open your web browser (I prefer Chrome) and sign in. Once you're signed in, it really doesn't matter what program you are in when you do this.
- In the upper right hand corner, click on the circle with your initial.
- Click on the circle within the pop-up box (notice that it says change).
- Click anywhere in the white box to choose a picture from your files.
- Once you've selected the photo that you want as your profile photo, click the blue Set as profile photo button.
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Not only will this add the image to your email, it will also show up in any Google program like Google+, Blogger, YouTube, Google Drive, etc.