Guzan has now challenged Villa to push on from last season and start the new season strongly, having struggled to get going 12 months ago.
"There were a few nerves at the start (of last season), which is normal," he said. "For us now it will be about continuing to build on what we started.
"The youthfulness, in terms of the energy, the buzz, and the excitement that goes around in the dressing room is great. "That is what creates the energy to go out and perform well."