build circuits and take measurements.
Put the knowledge gained from the books to real life use. Start with easier/smaller circuits, so to overwelm your self with the lessons gained from actual building.
A wise man told me before... "Engineers often design circuits that would never work in real life."
Remembering that engineering is mostly 'theory' - but in real life application (aka 'practical' application) we have to account for things as simple as component values because of manufacturing tolerance allowances, to more complex issues like environment affects on things like CPU's (too hot = damage).