Nasty drawing always helps me to loosen up. I leave gaps and love wrong marks - curves where there should be straights and vice versa. to draw in preparation for a watercolour painting, as with just about anything, less is more. One of my secrets is to hold my pencil at top so I can't be accurate.
I might not paint it like this but it will make me stop and think.
I should also add, I deliberately don't finish drawings on watercolour paper for painting, I'm hoping for some magic to happen and to see it and leave it alone!!
what do you think of Mimi's Rex cat? he's adorable but I can't remember his name, he's got the smallest ears I've ever seen!! he's got the loveliest fur, if you can sneak a pat he's just like a plushy toy!!