5.7 Right Mindfulness (Sammasati) is defined in these topics: The Four foundations of mindfulness, i.e.contemplation of the body, contemplation of feelings, contemplation of mind and contemplation of mind-objects
It means to be always aware and attentive before doing and working.
For instance the Satipalthana or Four foundations of Mindfulness which are the Body, Sensation, Mind and Dhamma. We should always be aware of what we think how we say and do. We should say and do with mindfulness on every thing.