A strategy is a long term plan of action designed to achieve a particular goal, most often "winning". Strategy is differentiated from tactics or immediate actions with resources at hand by its nature of being extensively premeditated, and often practically rehearsed.
The word derives from the Greek word stratēgos, which derives from two words: stratos (army) and ago (ancient Greek for leading). Stratēgos referred to a 'military commander' during the age of Athenian Democracy.