LPT: Don't right-click->correct incorrectly spelled words. Delete the entire word then re-type it correctly. Do this to train yourself to spell words right the first time instead of relying on spell-check.

Typing a word incorrectly then correcting it with spell-check becomes a habit. re-typing the entire word trains you to simply type it right which saves time and, in the event you need to use the word on paper with no spell-check, you'll know how to spell the word.

Edit: For clarification, this is to prevent you from making a habit of spelling the same word wrong. Instead of right-click->correcting the word, right-click to see the proper spelling then delete the word and write it properly to create a habit of spelling it correctly.