Centuries ago a man in China wrote `Stop thinking and your problems will end....regard the world like a babe`. The Tao Teh Ching is (partly) about letting go, about allowing yourself to respond.
Watercolour is a medium you have to partner, not one you can dictate to. This is why when teaching I attempt to get students to play - to paint without expectations.
Next time you paint, see where the paint wants to go and work from there. This will not be one to put on the wall or post on social media (although it may turn out that way). Paint for the fun of it.
Take an autumn leaf and observe the colours. Drop those colour onto your paper. Tip it, spray it, lift and salt.
Now try again using a clear wax crayon to mark the shape of the leaf.
I do this workshop every year around this time. Every time it is different, inspiring... and playful. Explore what you can do when you let the colour flow.