1. Write a blog post ofcourse. ^_^
2. In your blog post, leave your insertion point to the part where you want to cut your story. Insertion point is the blinking vertical line which tells where you are. Like if you click in the middle of the sentence, there leaves a blinking line.
3. Look for insert jump break icon on your blog editor.
Obviously, it is located right after the insert a video icon. Click it. Then something like this will appear.
This jump break icon is only shown in Compose or Rich text mode in blogger.
Actually, the simplest way is to add (for HTML mode) on the part you wanna cut your post short. Automatically, READ MORE will appear on your published post.
And you're done :) So, that's it! Hope this help. Haha!
PS. We're done with our defense yesterday, just need to revise some of the financial statement then we're done! :)