Diplomacy - The Game of International Intrigue
Never start a two-front war. For example, when playing
Germany, ally with either France or Russia while you
attack the other; you'll never accumulate enough resources
to support an attack on both.
Master the concept of "support." Live it, breathe it.
In a game that only allows one unit per territory and
in which all units are equal, knowing how and when to
support your attacks is critical for military success.
Learn the AI. Often, the AI will begin the game with
the same moves: France moves west, Austria-Hungary south,
and so on. Learning the computer's tendencies can make
your life much easier. For example, form an alliance with
France on the first turn. Let the French move on Spain and
then attack their undefended eastern borders in the second
Submitted by RickHH