The 30 Darts Game
A game Warren "Wazza" Ackary came up to improve his doubles hitting rate.
Take a sheet of paper and divide it into two halves. You divide the upper halve into 10 rows and 10 columns, the lower halve into 10 rows and 11 columns. On top of the columns you write the numbers 1 - 20 and in the last column DB - the numbers of the dartboard + the Bullseye.
You have 30 darts for each number but you always have to try to hit the double. For each hit double you get 1 point. Enter the points in the first row of the corresponding column.
When you have filled your sheet - which means you have played the game ten times - you can assess which doubles you hit best and which still need some work.
And when you have filled several sheets you'll be able to see whether the work on the doubles was effective.
Wazza himself was surprised by the results. He found out that he was in fact rather clinical on some of the doubles he always assessed as his trouble areas while at others he usually preferred he was not clinical at all...