The prime minister had listened to people's views on gangs, he said
Gordon Brown "is always ready to listen...and take action", he has said as he tries to limit damage over the 10p tax row ahead of local elections.
The prime minister, writing in the Sunday Mirror, said it was "vital to get out and vote Labour on Thursday".
Concessions have been offered to some low earners and pensioners, amid fears of a Labour rebellion, after Mr Brown scrapped the 10p income tax rate.
It comes as a poll suggests the Tories have an 18 point lead over Labour.
The YouGov poll for the Daily Telegraph put the Tories on 44% to Labour's 26%.
'Will to unite'
"Whatever the differences and debates of the past week, I know every member of the Labour Party will be working flat out over the next few days to bring this choice alive to people, and show them why it is vital to get out and vote Labour on Thursday," Mr Brown said.
"And just as we showed them last week in relation to the 10p tax rate and the support we give to pensioners and workers on low incomes, Labour is always ready to listen to people's concerns, and take action on them."
He also said the government had listened to people's demands that police "come down hard" on gangs.
He said he wanted neighbourhood police teams in every area of the country to be working with community centres and arranging activities to get youngsters involved in.
Speaking in Saturday's Daily Telegraph, minister Tessa Jowell - who is running Labour's London mayoral campaign - backed the prime minister, saying the party's "will to unite is now greater than it's ever been".
"Any divided party is likely to lose an election. What we have to demonstrate is that we are a united party and not a Westminster-bound party that is fighting like ferrets in a sack," she said.