The Paisley side drew praise in recent seasons for their attempts to play a possession-based game, something Lennon feels they have neglected during their troubled start to this campaign.
St Mirren head into tomorrow's home match against Motherwell still seeking their first win having taken just one point from their opening four league games. Their defence of the Scottish League Cup was also ended at the first hurdle by SPFL Championship side Queen of the South.
Without a game for a fortnight because of the international break, there has been plenty of time for reflection and contemplation among the St Mirren squad, and Lennon believes it is time to consign Plan B to the bin.
"I would say we're not playing enough football and I think that's been a big part of the problem," he said. "I've seen it only in spells this season. We need to get back to having longer possession of the ball - the style that we're used to - and if we do that we'll give ourselves a better chance of winning games.
"Against Partick Thistle two weeks ago I kept hearing the shout 'what's Plan B?' Well, they had Plan B for 90 minutes and it obviously didn't work. So we need to get back to Plan A. We have to show we can still play the brand of football we have a very good reputation for.
"We've got to get back to holding on to the ball better, passing it through the middle rather than going direct, and generally having more possession. We've got good quality players who can do that although many haven't hit top form yet for one reason or another. I have a part to play in that as well but not sole responsibility. So we need to get the players focused on what their jobs and responsibilities are."
Lennon stated his squad remain confident they can turn things around. "Not having a game last weekend has given us a chance to lick our wounds and heal," he added. "The boys have been very lively in training this week. There's been no-one moping around the dressing room feeling sorry for themselves. We've all got great professional pride on the coaching staff so we're not just lying down and accepting these poor results. We can't wait for tomorrow's game to come."