The meditation one in particular sounds interesting. I'll try it. flux is something I've already experimented with, and I do exercise regularly.
I've had the opposite experience with eating – if I eat a lot right before going to bed, it seems to help. But I guess it's not too surprising if that one differs from person to person.
If you want to explore the community more, I recommend reading the Library, checking recent Curated posts, seeing if there are any meetups in your area, and checking out the Getting Started section of the LessWrong FAQ.
The Open Thread sequence is here.