Chelsea are entering a busy period, with the Europa League last-32 matches against Sparta Prague either side of a FA Cup fourth-round replay with Brentford and before a Barclays Premier League clash with Manchester City.
Lampard said: "We're fit enough (to play twice a week). We manage ourselves in training.
"We need to enjoy it. At the minute the season hasn't been successful.
"We should be challenging for titles rather than third or fourth, but we're not.
"And we've not won some cups, we've been knocked out.
"We have to grab the fact that there's a lot of games to play and we have to try to win something."