Ipswich boss Paul Jewell has admitted he has been guilty of trying to do too much too soon at Portman Road.
Jewell has brought in 13 new players since the end of last season and says they will need more than one campaign to gel.
"We're trying to build for the future. Not just this season," he told BBC Radio Suffolk.
"I think one of the mistakes I made was try to cram everything into one year. Longevity is the answer."
He added: "You need to get players who will be here in three to four years and get them settled.
"Maybe that's one area I haven't got it quite right."
Ipswich are on a seven-game losing streak which has seen them tumble from the top half of the table to the brink of the Championship relegation places.
And Jewell, who received the backing of the club's owner last week, has also had to contend with newspaper reports suggesting he has fallen out with Jimmy Bullard over the midfielder's alleged refusal to move to Suffolk.
"Me and Jimmy were laughing in training this morning even though we're not supposed to be speaking to each other," he said.
"It's disappointing. The only truth in that story is that he lives in Cobham. He has a driver that drives him around.
"There's no bust-up. Jimmy's not in the team because, like a few other players, he's going through a bit of a spell."
Meanwhile, the Town boss confirmed defender Ivar Ingimarsson will miss Saturday's clash with Barnsley after breaking his nose in training.
Goalkeeper Richard Wright's shoulder injury keeps him out of contention but midfielder Grant Leadbitter is pushing for a return after a groin problem.