Jim Mallinder has warned Saints that all their good work will be forgotten if they let their standards slip in the next few weeks.
The Premiership champions currently sit 12 points clear at the top of the table and also have a Champions Cup quarter-final and LV= Cup semi-final to look forward to.
But they face a tricky end to the league season, with Saturday’s trip to Gloucester followed by clashes with Wasps, Exeter, Saracens, London Welsh and Leicester.
And Mallinder has urged his team to maintain their momentum as they bid to convert their points advantage into a second successive title triumph.
“It’s a good lead,” said the Saints boss. “You’d definitely have taken it at the start of the season, but we don’t get anything from being in this position.
“That will be quickly forgotten if we lose a few games, if we don’t get a home semi or if we don’t go on.
“We know where we’re at. We didn’t play brilliantly last Friday, we can do better, but we’re happy to have that lead.”