Accept the challenge
Not many people believe that yoga can be challenging. I have had a couple of people remark that they had tried yoga in the past but it sent them to sleep! Yes! Yoga can be challenging even if it is simply balancing in tree pose or getting stable and comfortable in warrior 2. Everyone has that one pose that makes them feel wobbly, sweaty or scared. Often these are the poses that we need to practice more of. Accept the challenge, practice daily and a good TIP is to try and record yourself doing it. It may sound silly, but often at home we don't have a big mirror to help us align ourselves. Recording yourself or even asking someone to take a look at what you are doing may help align you better and ensure you are not just doing the pose wrong.
Avoid risk of injury
Not many people know this, but people who seem naturally flexible are more often that not hyper flexible or joint hyper mobility. People who are hyper flexible are not aware of the ligaments holding the muscles which attach to the bone, which in other people can limit space of movement in a pose. This could result in a joint being dislocated or muscles can rupture and become damaged, especially when repeated daily or weekly. A good yoga teacher should be able to identify pretty quickly whether any students have joint hyper mobility and adapt any poses for them to get the most out of it.
Yoga is for everybody
There seems to be a big trend at the moment where talented dancers or gymnasts at Olympic level are making their next move into the yoga world with there being some cross over for flexibility and strength. However, be mindful that you really don't need to come from these sorts of backgrounds to do yoga. In fact for all those people who have office jobs, or those who are constantly on the move have more a need to seek out yoga. Apart from relieving stress, yoga has many other benefits, which you can find here.