[header] How to avoid smiling at inappropriate times [title] Ask a friend if they've noticed your inappropriate smile. [step] Choose someone who you've been in some uncomfortable situations with. These are most likely to be the times you've smiled inappropriately. 
[substeps] Even if you're positive that you smile inappropriately, it's good to ask a friend. They might not have noticed, or the problem may not be as bad as you think.