Cambridge United boss Richard Money says he was not sure the club could win promotion back to the Football League when he was appointed.
Money, 59, took charge of the U's first team in October 2012 with the club lying 15th in the Conference table.
The following season, Money led the club to the FA Trophy and promotion.
"If I look back to my opening day I'm not sure whether I genuinely thought that we could get back in the league," Money told BBC Radio Cambridgeshire.
"I did think we could the following summer and now that we have got back in the league, we want to try and take them as far as we can," he added.
"I certainly would like another promotion on the CV before I leave the club but how soon we can make that happen is not clear."
After three years in charge at the Abbey Stadium, Money admits the pressure of the job makes it hard to switch off.
"Because you care and because it means such a lot for people, it's very difficult to get away from the constant thought process of 'what are we going to do to make us better?'"