Guaranteed Calm is a series of six short (spot) meditations. Each of these mini-meditations could be completed in 30 to 90 seconds. Alternatively, you could do them in a leisurely fashion, spending five minutes or more on any given technique.
When completed back-to-back (in any order) they provide a useful template for a longer (10 to 30 minute) meditation.
It might sound like you’ll be kept busy (doing six techniques in one session) but our minds enjoy variety, and paradoxically, this variety makes it easier to remain focused. This, in turn, allows the mind to settle, and helps the body to relax.