Husserl used to say that to his seminarians to keep them careful and wissenschaftlich and away from assertions of the high-flying and sweeping sort. Unfortunately, the philosophical small change doesn't add up. Specialization, no matter how narrow and protracted, no matter how carefully pursued, fails to put us on the "sure path of science."
Given that plain fact, you may as well go for the throat of the Big Questions. Aren't they what brought you to philosophy in the first place?
This line of thought is pursued in Fred Sommers Abandons Whitehead and Metaphysics for Logic.