We have engaged in daily solitary practice for decades, using methods intended to foster honest, self-aware, non-moralistic being.  In addition to the Christian use of scripture and prayer we have practiced meditation, Diamond Heart Inquiry, journaling, The Work of Byron Katie, yoga, Qi Gong, Tai Chi, and other methods.
Calling on the traditions of the Christian contemplatives, especially Benedict and Ignatius, we have created the following 30-day manuals:

A Solitary Manual – which includes a ritual of silence and a reading and paraphrasing of a psalm each day

The Practice of Prayer – which includes silent prayer and writing prayers in the categories of confession, gratitude, petition, and intercession

A Solitary Manual for Realistic Living Volumes I and II – using journaling and scripture to interact with the life of Jesus

Benedictine Manual Volumes I, II, III, IV, & V – interacting with the Psalms by journal dialogues.