1)They turn Citi-Field into a fortess:
A winning percentage of .700 is required at home the rest of the way. They have to take advantage of this schedule and win a lot of games, especially at home.
2) Reyes and Beltran have to return and produce:
Their line-up could look something like: Reyes, Castillo, Wright, Beltran, Francoeur, Murphy, Pagan, Santos. The Outfield will finally look like a decent one with defensively and offensively.
3) The teams ahead of them come back to the pack:
Rockies have been high for sometime now, hope they hold back. Giants lack of offense catches up to them. Brewers just collapse, Astros get old, and the teams in their division they have to beat.
If these three things happen come the last week of the season they won't be the ones in the position to choke, but have history repeat itself on the 40th Anniversary of their 1st title.