I think the best way to stay motivated in the yoga practice is to switch it up now and then. I like experimenting with transitions to keep things interesting, and this is the most recent one I've been playing around with. I like to do the transition from headstand to crow and then jump back into chaturanga. First make sure you know how to do crow pose - the rest is taught in the video below. What transitions are you playing around with in your practice?
PS- Looking for a longer yoga video? Check these out.