Avdi Grimm has posted a nice video demonstrating Artur Malabarba’s autocorrect code. The code is just a bit of Elisp that you paste into your init.el; no packages necessary.
Once you have it installed, it allows you to correct a misspelling and add the misspelling and correction to the abbrev list so that the next time you make the misspelling, it will be automatically corrected.
Old Unix heads will remember aliases in their .bashrc (or whatever) files for things like mroe = more and other common typos. This facility is similar but more convenient because you can add to the list on the fly. If you have things you commonly mistype, this may be just what you need. Watch the video and see if it’s for you. The video is less than 3 minutes so it doesn’t require much of an investment.