The reigning European champions have achieved a club-record, 19-game winning streak, after recovering from a shaky start to 2014-15.
Their good run could be extended again on Friday when they travel to Almeria in their final Primera Division game of 2014.
With the team two points clear of Barcelona at the top of La Liga, they head to Morocco to take part in the Club World Cup.
However, Costa Rica international, Navas, who joined from Levante during the summer, has warned his team-mates not to let their concentration slip as the winter break approaches.
“This team cannot make mistakes, we must stay focused 100 per cent and work to be prepared at that time.
“Every victory is celebrated, we are delighted when we win. We know we’re at a winning club where you have to triumph; every game that brings us closer to our goals of being champions,” he told Goal.com.
The shot-stopper is also thrilled to have played a part in Real Madrid’s last two UEFA Champions League wins, despite having largely been second choice to Iker Casillas since his arrival.
“It’s amazing to be at Real Madrid,” he added. “It’s a dream for any player that, when it becomes a reality, is difficult to explain.
“I think about everything I’ve been through to get here. Playing in the Champions League … I enjoyed it from the moment we left the changing room. The only way I’d heard that anthem before was on television and being there was a dream come true.
“I always wanted to win titles and now I have the chance. I try to adapt, to commit and to contribute. The road is hard, there will be barriers, but I’m willing to work hard for many titles here.”