Two signs of weak listening skills -

1. You auto-complete someone's thought in your head and disengage mid way, or start preparing your response.

2. You hear an interesting keyword and drift into your own related thoughts about it.

I see this happen so often when I meet people now. Listening is an active, energy-consuming, difficult task. It is not the same as 'hearing'.

Giving someone your entire attention is a form of care and respect and very few people now seem to understand how to do it.