The course locations set up great for him. 10 majors between now and the end of 2010. First, two Masters. Tiger has won 4 out of 11 of them. Safe bet is he wins 1 of the next 2.
Also, the next two US Opens are at Bethpage Black in 2009 and Pebble Beach in 2010. Tiger has won the US Open both times it was played at these locales. He won Beth Page in 2002 by 3 strokes and Pebble Beach in 2000 by 8 strokes. Safe bet 1 out of 2.
The British Open is at Royal Birkdale this year, Westin Turnberry next year, and the Old Course at St. Andrews in 2010. Woods owns the Old Course. He won the British Open in 2000 and 2005 when it was played there and the closest anyone got was 5 strokes. Turnberry has not hosted since 1994, so Woods has never played the Open there. He last played Birkdale in 1998 where he finished 3rd. Safe bet 1 out of 3.
Finally, the PGA Championship is at Oakland Hills this year, Hazeltine next year, and Whispering Straits in 2010. Tiger finished 2nd at Hazeltine in 2002. 24th at Whispering Straits in 2004. He finished first in cup points at the 2002 Ryder Cup held at Oakland Hills. Safe bet again 1 out of 3.
That would give him the needed 4. Another thing to consider is he could tie Snead's career PGA tour wins by the end of 2010. He currently has 65 and the record is 82. He has averaged 7 wins the past 3 years. If that holds true he'd tie it (65 + 3 more wins in 2008 +7 wins in 2009 + 7 wins in 2010). So he could be playing in the 2010 PGA Tour Championship to break both records.