To be honest, I never recieved any instructions the first time I landed on a grass strip, P1. The only thing I was told when I called for PPR at the airfield was not to perform excessive braking. Since then, even in the summer I try to make the landings as gentle as possible and really minimise the braking, even if it means using the full length of the strip, just as a courtesy to the airfield. I find landings on grass much easier and smoother, but takeoffs always seem to bumpier and feel as though they take an eternity longer (as you'd expect, and as per the performance figures)
I have recently been flying at a busy grass strip in Germany where you're encouraged to vacate as early as possible, even if still going quite fast. I tried this when it was wet, and did realise that application of brakes and trying to turn slightly results in sliding sideways towards the runway markers. I won't be doing that again in a hurry.