Conquer or capture all the planets except for the mission planet.
Then, fortify the planets around your mission planet. Once this is
done, set the game to fast forward and allow it to run. Check on it
occasionally to make sure you have not been attacked. After awhile,
check your cash flow. If you like it, resume normal play and complete
the scenario. If not, just wait and let your money build.
conquer all the space over all the planets the put 1 unit over all of
the ememy planets then sell all your building on every planet and build
mining facilitys on all your planets
note: I only tryed skirmish i don`t know about multi player