I was told when you don't feel like meditating you should try doubly hard to enforce the habit.

Restlessness will always be, but where our consciousness resides, we have the freedom to decide. It's an every day battle in the pursuit of Liberation and the seeking of God.
Restlessness the outgoing dissipation of the souls attention is the most disabling weapon, employed by the evil perpetuator of change for delusion. A restless body and mind are the playground of Satan, who loves to perform there his wiley dance of distraction to divert man’s consciousness from the immutable spirit, and it’s calm reflection, in the depth of the soul. But one who regularly and deeply interiorizes the mind, through devotional meditation is aided by the uplifting vibrations of the Holy Ghost and finds himself immersed in God all the time, in the redemptive grace of divine peace, love, and joy.
Unwillingness to meditate should be recognized as among the foremost enemies of men’s physical, mental and spiritual well-being that “blasphemy” against the inner magnetic full of the Holy Ghost should be consciously excised from the mind. One who never meditates rejects the prime means of a tuning his life with a saving Christ consciousness inherent in the cosmic om vibration. By deliberately deeper acts of meditation each seeker must remove his Restlessness, in order to regain bliss consciousness, through vibratory contact of God, as Holy Ghost is introduction to the infinite Christ, and the cosmic consciousness of spirit.
~ Paramahansa Yogananda ( The Second Coming of Christ )