So a lot of people that I know that are pretty clumsy are those people that are always in a rush or moving too quickly. They always have something else on their mind other than being in the present.
So some tips are to just be more observant. I know that’s an easy thing to say, and in practice it’s much more difficult, but just check your surroundings and pre-plan movements in your head. If you see something that you could bump your head into, make a mental note that you need to give it more space than you’re thinking. If you’re always dropping something, then make a plan to put it into place where it won’t fall. Like grabbing your phone and putting it in your pocket or your purse.
I think linear thinking helps reduce clumsiness. To get into mindset of following steps a, b, and c when performing a task could help. That being said, I am no expert and we all are clumsy from time to time.