I think everyone feels like that at one time or another. I get the doubts creeping in, too. You hear of so many people failing at this, but I have to try. If I don't try, I've already failed so just do a little every day and see where that takes you.

I am just going to throw some thoughts out there:
Product reviews
Massage techniques
Massage therapies
Expand on some of what you have already said
Are there foods that promote relaxation?
What did you do last night to relax?
Not to be brash or personal or anything, but you might generate some interest talking about what people can do for each other to help relax (use your imagination)
It is ok to rehash info, but put a different spin on it.
Oh, here's some more, you mentioned music and sound, could you not review some good noise cancelling headsets also?

I hope one or more of these helps to unstick things. I understand how that feels, and sometimes a good brainstorming session helps.

Jerry
fitand50online.com

It's really all about the research you do online and seeing the diff sites that are both reliable and that offer beneficial products for your niche audience..then you can implement and inform your audience with info that relates to those sites and products...well at least thats what I think is wise..good luck