There are numerous publications and sites dedicated to church architecture and history.
If you are looking for advice on how to look after your church building, try the Church of England Churchcare site. For information on stewardship, administration and management of a local church (including fundraising) see Parish Resources.
For up-to-date news and briefings on matters relating to the future of historic places of worship, the Historic Religious Buildings Alliance page is here.
For ideas for church visits and for a simplified architectural timeline of English churches see ChurchDays.
And lastly, for archives and records visit the Lambeth Palace Library.