Good bundle of 3 or 4 games with every XBox 360 purchase or a Kinect with every XBox 360 or a $50 or $100 gift voucher with every XBox 360 purchase in November and December to coincide with big game releases and the Xmas sales period.
1 million gap between PS3 and X360 in 2011 can be narrowed in the last quarter. PS3 will stay ahead of the X360 in 2011 by less than 500,000 units. PS3 = 13 to 14 million sales. X360 = 12.5 million to 13.5 million sales.
It is possible for the X360 to tie the PS3 for the year by outselling the PS3 by 1 million in tha last 3 months but unlikely. More than likely the gap can be narrowed as the X360 finishes the year as good or better than the PS3.