The beaten National League Promotion Finalists held AFC Wimbledon to a 0-0 draw on Saturday.
Wood were much better than they were against the National League South Rebels.
Garrard’s team begin the season against Dagenham & Redbridge on Saturday as the season gets under way.
“We need that,” the manager told the club’s video service.
“On Tuesday night against Slough we let ourselves down a bit.
“Against Wimbledon we looked strong and very organised defensively. We finished the game strong and we were a threat to them.
“Of course the real work start of the 4th of August but where we’re at the moment I am happy.
“We’ve now got Crystal Palace on Tuesday night and hopefully they will bring a good squad down for the game.
“I have got to be sensible with utilising our team but we’re looking forward to it.”