Isaac Vassell's late header earned Truro City a home play-off final in the Southern Premier League with a 1-0 win over Hungerford Town at Treyew Road.
The substitute's winner means Steve Tully's side will host St Neots Town for a place in Conference South.
"The biggest word was 'patience' - believe it's going to come and it will," Tully told BBC Radio Cornwall.
"Vass' pace really frightens teams and I'm delighted he scored because he's deserved that."
In the other semi-final, St Neots beat Poole Town, who finished second, meaning Truro have home advantage for the play-off final on Bank Holiday Monday.
The White Tigers have not lost a home league game since October, when they were beaten 4-1 by Cirencester Town.
"I thought we thoroughly deserved to win - I don't think they had a shot on target," added Tully.
"We enjoy playing football here (at Treyew Road), the supporters are great, and we'll work hard between now and Monday."