Where to start laying hardwood floor in "T" shaped room
Say you start with your piece running parallel to A.  You take it from the bottom left corner all the way up to the F wall.  Solid piece, all the way up.

Now you backfill to the left of the piece, working towards D.  When you reach D, you will probably need to do a rip cut for the last piece to go in D.

You'll cross the room from A to B also putting in full pieces until you hit B at which point you'll probably need to do some kind of rip there as well.

Here's the only really tricky bit - where B meets the wall that links to C you'll have to do a partial rip cut.  Your rip should let you fit the piece in at B but where the space to C is, you want the full piece.