Next time you write something, look back at it after 24 hours.
Try to change any Latinisms to simpler, more Germanic words. (Change ‘fortunate’ to ‘lucky’, for example).
Try to change passive verbs to active (‘we threw the rock’ vs ‘the rock was thrown’).
If the word or phrase would be used in a corporate setting, get rid of it (‘in terms of’, ‘circle back’, ‘action items’ can be changed to ‘about’/’regarding’, ‘come back to this’, ‘things to do’ etc.
Hope this stuff isn’t too obvious and is perhaps a little helpful.