Measure the footprint, not just the height
A tree can fit beneath the ceiling and still overwhelm the room. Check its widest diameter, the stand and the space needed to reach it. Mark that footprint with paper on the floor and leave it there during an ordinary evening. Open curtains, use the sofa and carry a tray through the room. If the marked area interrupts these movements, choose a slimmer tree or a tabletop version before rearranging the entire room around it.
Keep the useful corner useful
A corner beside the television may look ideal until the tree blocks a drawer or the only accessible socket. Check those details before moving furniture. Keep doorways and circulation routes open. The CPSC advises keeping trees away from heat sources; consider the radiator, fireplace and other heat-producing equipment when choosing a position. A slightly off-center tree can work well if it lets the rest of the room continue to function normally.
Decorate for the view you actually have
Sit where you usually sit and check the tree's outline from there. Concentrate the most visible ornaments on that view while distributing their weight sensibly. Avoid making the lower branches so crowded that nearby seating becomes awkward. If a side table has been removed for the season, provide another proper place for a drink. Photograph the finished room from the doorway; next year you will remember both the attractive arrangement and which furniture had to move.

