The midfielder scored a stunning first senior goal for the club to clinch a 4-2 win and the Premiership points at Charlton last week.
It's a far cry from the frustrating days of injury a couple of years ago as he battled to impress in the reserves and believing he was on his way out of the Lane when he went to Coventry City on loan earlier this season.
He was recalled from that loan on December 20, made his Premiership debut at Portsmouth on Boxing Day and has gone from strength to strength since.
"You've just got to keep going," said Jacko. "If you are confident in yourself, feel that you can do it and keep putting the performances in you can't get ignored.
"I went away on loan, did well and now I've been given my chance. I'd like to think that I've taken it to an extent.
"It shows you how quickly things can turn around when you get that opportunity. If I hadn't been given it I would always have thought 'who knows?'. David Pleat has given me my chance and hopefully I am repaying him."
Johnnie Jackson is reaping the rewards after refusing to give up on his Spurs dream.