Ways to spice up the sex in the bedroom?!

So me and BF normally always have really good hot sex. But I was just after some advice from some of you of ways to spice it up that doesnt involve lingerie and how to feel confident about it as I suddenly think "shit Im doing it wrong and he doesnt like it and it doesnt feel good!"

Plus I do tend to get sweaty hands unfortunatley when we have sex! Weird I know but Im always like it and always have been when I get nervous and Im just a very warm person naturally!