How does one hold themself in full awareness during new complicated and complex learning?

In one of Eckhart Tolle talks (can't find the exact one yet) he mentions how most people "loose themselves" at/during "work". i.e. - lose awareness of body, emotions and thoughts. For me this seems to be true - "digging deep", my consciousness becomes completely enmeshed in the academic or work at hand. Although similar to this question , I see this answer of mindfulness as a general way of working. But more specifically, is it possible for those fewer moments of very new, complex and complicated learning, to be like this? I cannot see how they can coexist. What would that look like and how is it done/practiced specifically?