I love these lines from John Chapman (1865-1933), an English Benedictine abbot known especially for his work in retreat leading:
??the only way to pray is to pray; and the way to pray well is to pray much. If one has no time for this, then one must at least pray regularly. But the less one prays, the worse it goes. And if circumstances do not permit even regularity, then one must put up with the fact that when one does try to pray, one can?t pray?and our prayer will probably consist of telling this to God.? (Dom John Chapman. The Spiritual Letters. London: Sheed & Ward Ltd., 1935, 1969, p. 53.)
Continual prayer is best. Regular prayer is good. Without regularity, our prayers may well be honesty about our struggle to pray! I find this encouraging and challenging.