Act out every detail of your favorite fantasy -- in your mind. That's right. We're telling you to turn yourself on using only your imagination.

Envision having sex in your college library or in a lifeguard chair at the beach…wherever you’ve always thought would be truly naughty and exciting. Go there in your mind -- believe it or not, you may not actually have to go there in person for the sex to be truly titillating.

Nestperts: Joselin Linder and Elena Donovan Mauer, authors of Have Sex Like You Just Met (Adams Media, December). Read more at their blog.

-- Joselin Linder & Elena Donovan Mauer

See More: Love & Sex , 30 days to great sex