I've got two rectangular rooms that join together through a 8 foot opening. Both rooms are around 18 feet wide. Should I start on my longest wall, or the wall that is the most visible? Someone in the past mentioned starting in the middle room but he didn't give a reason why. Thanks for everyone's help.

Two rooms shaped like and H or shaped like an I, you get what I mean???

Shaped like an I (providing I understand you correctly.) The two rooms flow into each other. Make sense? I could e-mail pictures.

_____________
|*************|
|*************|
|____*** _____|
|*************|
|*************|
|_____________|


^
|

->

?????????

On the left hand side that is a hallway (tile) that walks you into the room at the top so the wall on the far left hand side is very visible with no furniture up against it.) The wall on the right hand side in the room at the top has tv, speakers two chairs on it.

____________
|***********|
|***********|
|***********|
|***********|
|***********|
|***___*****|
***|********|
***|********|
***|********|
***|********|
***|********|
***|********|

Are the lengths of your boards going to run through both rooms. Up and down in your diagram, or across?

The boards will be running through both rooms (up and down) not across the rooms.

Start on the right and work across to the left. Back lay if you have to.

Floorguy - on the right-hand side of the room there is also a 1-foot stub wall that lines up with the other wall that creates the doorway between the two rooms. I neglected to draw that in my diagram. Will this change where I should start? Where that hallway will meet the hardwood, I have a Schluter up against my tile. I am going to run a piece of hardwood parallel with the Schluter and then butt the hardwood up to that. Will I run into problems with this if I start on the right-hand side of the room?

Start on the long right wall, or if you're worried about meeting up around the 1-foot wall, start at the red line and work forward, then just turn around and fill in the two small areas on either side of the wall.

Assuming you're using t&g flooring and working left to right, starting on the right wall is planning ahead. That way when you get up to where your turned board is between wood & tile, you'll be able to put the grooves of the boards you're laying into the tongue of the turned board.