Go on Xbox Live, select Public Game and win a game. Remember, have a good strategy going online as there'll be a lot of experienced players out there. Remember the fundamentals of the game: rock beats scissors, scissors beats paper, paper beats rock i.e. each unit will have their own strengths and weaknesses (both yours, and theirs), so play to your advantages and their disadvantages. If all else fails, rush the mofo from the off... you'll get lucky at least once. Oh, and choose your leader wisely.