Garcia and his squad currently find themselves in 10th place in the French top flight following their 3-1 victory over Lyon in their last outing on Sunday.
Lille are preparing to face Rennes on Friday night at the LOSC Lille Metropole and Garcia has called in his players to close down the six-point gap to the top four in the Ligue 1 table.
Garcia said: "There is a long way to go before the end of the season and we have got to focus on Rennes because it is a big game for us.
"There is no magic formula but we know the ingredients. It takes determination, technical quality and efficiency in important areas to get where we want to be."