When I was a young Christian all the emphasis was on personal disciplines, particularly of daily prayer and Bible study. Personal disciplines remain important, but I do not believe they are sufficient to form Christian character today.
In those early years of faith the Christian story was better known in Britain, and 'Christian' values taken as norms, even if they were not adhered to. Culture reinforced discipleship much more than today.
Today culture is more likely to be corrosive of discipleship as supportive. It is corporate disciplines and support which are needed. A Christian way of life - the daily practice of obedience to Jesus - needs a proactive supportive community. The term 'one another' appears frequently in the New Testament and it is persistent, intentional 'one anothering' which will enable lives of discipleship. I do not know how discipleship can be sustained without some regular, face-to-face small group for mutual support and challenge.
(Graham Cray in the latest e-xpressions newsletter, subscribe here)