I see a lot of new people joining the platform. The old posts about posting a picture are hard to find after a ton of new articles everyday.
Here are the steps:
1. Go to tinypic.com
2. Click on "open file". Then choose your file in one of your folders.
3. Then click on "Upload now!".
4. Now copy the first link made for websites.
5. Paste this link in your Steemit post.