Sports psychology for overcoming distraction?

Has anyone got tips for overcoming distraction?

This morning I was getting in some archery practice before the day gets too hot (I managed to knock out just over 100 ends without feeling achy, which is good progress in terms of conditioning) however I struggled with concentration ... there were many things to distract me, mostly noise but also being attacked by mosquitos and a little frustration with part of my technique that I need to work on.

I took my time to breathe and try to focus, but with someone splitting bricks by hand nearby it still cut into my head.

So, any advice would be appreciated!