NY Giants Co-Owner -- ADVICE TO TOM COUGHLIN ... Here's What Ya Gotta Do ...

Don't stick a fork in the NY Giants just yet -- because co-owner Steve Tisch says he still has HOPE the G-Men can make the playoffs ... and he's even dishing out advice to his coach Tom Coughlin.

Tisch says the team needs to WIN OUT after losing to the Jets Sunday night -- beating the Dolphins, Panthers, Vikings and Eagles -- but he's confident he's got the players and the staff to pull it off.

In fact, Tisch told our photog exactly what Coughlin needs to do in order to get the Ws he needs.