I have put some links to various sites here that relate to retreats, meditation and prayer that you might find useful. If you have any ideas for other sites that could appear here then please leave a reply below.
Quaker Faith and Practice – The basic book for British Quakers which is also available as a printed or eBook from all the usual places
Pray as you go -a daily prayer resource
Christian Meditation -for help on silent prayer
Spiritual Directors International
The Retreat Association -especially good for finding retreats