What are some good darts practice routines?

Question

for 01 games or cricket

Answer 1

Hit all doubles 1-20 then all trebles 1-20 bullseye then a few games vs myself at 501

Answer 2

there is a good double game that i play and i call it 1 dart double it is where you throw 1 dart at double 1 1 dart at double 2 and 1 dart at double 3 and then for example if you hit double 2 the next go would be double 1 double 3 and double 4 and so on till i finish on the bullseye