In an hour, I shall be setting off for town to queue up in front of WHSmiths, armed with chocolate biscuits, cakes and of course my precious pre-order receipt (and davesangel's!). My plan once I've got the book is to return home, make coffee and spend until at least 4am getting a sense of its overall plot and shape: much as Oscar Wilde used to do. Once I wake up again, I'll then continue learning more about the major plot details and developments over the course of Saturday, but also allow a bit more time for reading interesting-looking passages in a linear fashion.
The reason for this approach is two-fold. One, it will mean that by the time I go to sleep I'll already be essentially immune to spoilers, and will be able to start taking part in online discussions of the book almost straight away. But two, after the end of Saturday, I'm really going to have to all-but-drop-it again in order to concentrate on preparing for my Reading interview. Saturday is Harry-day, but I can't really let myself remain wrapped up in it any longer than that, and so I need to get as much as out of the book as possible during that time. Slow, linear reading can then be enjoyed at my leisure once I'm done at Reading.
Naturally, I faithfully promise assiduous use of lj-cuts and spoiler warnings in my LJ once I'm ready to start chewing over it myself - you lot know me better than to think I'd blow it for you, right?