In Celebration of Discipline: The Path to Spiritual Growth (page v) Richard Foster distinguishes between inward disciplines, outward disciplines and corporate disciplines.

The Inward Disciplines

• Meditation
• Prayer
• Fasting
• Study

The Outward Disciplines

• Simplicity
• Solitude
• Submission
• Service

The Corporate Disciplines

• Confession
• Worship
• Guidance
• Celebration

This may help us remember that ultimately the spiritual practices are not a private, self-focused matter.