get your hand in

get (one's) hand in (something)

1. To have a contributory role in something. It was pretty exciting to get a hand in launching the new business.
2. To continue to do something in order to maintain a particular skill or ability. I've mostly stopped acting, but I will do a play occasionally, just to get my hand in.
See also: get, hand

get (or keep) your hand in

become (or remain) practiced in something.
See also: get, hand