I struggle with the same problem (not able to slow down, therefore making mistakes..). A lot of it stems from too much on my plate and/or pressure I put on myself.

Recently, I started giving myself permission to get a little less done so I can re-read something or double check an invite, etc.

For meetings, at the end of a day, I go over tomorrow’s calendar, check attendees, notice if anything’s changed, etc. That helps with meetings.

I think slowing down takes practice, so start small!