Have you ever said: I'll be happen when I get that promotion or am in a relationship? Santosha is a reminder to be content where you are at now, and not just where you want to be.
There are many aspects of our life that require self-discipline be it taking the time for our yoga practice or making the time to do something we've said we're going to do.
Yoga is a practice of getting to know yourself. Svadhyayay refers to taking the time to reflect which can look like journaling, connecting with your yoga practice, therapy, or other ways to reflect inward.
Release your attachment to the outcome so that you can be present.