What's the best advice you've received in relation to cricket?

I have a few that have stayed with me from my early teens.

Batting
Always play the V between mid-off and mid-on until you've scored 20

Wicket Keeping
When standing back to the faster bowlers always catch the ball on the inside hip (outside off and down leg side) as it will extend your reach for catching opportunities.
When fielders are throwing the ball in from the outfield move and look to catch the ball on the full. Nothing worse than watching a ball being thrown in from the boundary and the keeper lets the ball bounce in front of them. Keep it tidy.

Captaincy
Communicate with your players and discuss and agree on their role in the team

Team
Enjoy your team mates success

Try to join a Club or team with a no d**khead policy. Life is too short to play with them.

Stay in the moment and remember that most of the game is “above the shoulders” by which I mean adopting the right mindset!