Scunthorpe moved out of the League One relegation zone with victory over Leyton Orient, who slipped further away from the play-off places.
Striker Akpo Sodje fired a low shot in to the bottom corner to give the Iron an early lead.
They doubled their advantage when Niall Canavan nodded home from Mark Duffy's cross for his sixth goal of the season.
Orient got themselves back into the game through Kevin Lisbie's header but failed to find an equaliser.
The hosts were indebted to young keeper Holmen Johansen, on loan from Manchester City, who pulled off second-half saves from Dean Cox, Jimmy Smith and Charlie MacDonald.
Orient now sit five points off the play-offs in 10th, while Scunthorpe are a point away from danger.
VIEWS FROM THE DRESSING ROOM
Scunthorpe manager Brian Laws told BBC Radio Humberside:
"It was a vital win, they're all must win games before the end of the season, and this had to be the first - one to give us confidence going into the next game, but also to squeeze a bit of pressure onto the opposition around us in the table,
"Performance is second, it's about heart, commitment, guts, you name it, we've had to do that against a Leyton Orient team, who are pushing towards the playoffs.
"You could see they were going to be in the game with three strikers on; their intentions were very clear, so we knew we had to defend well. At times we got a bit sloppy and caused ourselves a few issues and problems."