First time w/ hardwoods. Purchased Traffic Master engineered hardwoods for the whole house. Where do we start? How do we know one room will line up to the next, and into the hallway? Any trick we need to know? Thanks!

The best thing to do is to draw your layout on graph paper for each room and do your design on there. Treat each room as a separate room and use transition strips in the doorways. You could dry lay a few pieces together and move them around to see how they fit.
How to Install Engineered Hardwood Flooring | eHow.com
Install Prefinished Wood Flooring | thefamilyhandyman.com | DIY Projects | Reader's Digest