Try Not to Settle
Choosing furniture is extremely stressful. It can put unnecessary strain on your relationships with other people that live in your house, and it can also make your house feel incomplete if you don't make a decision right away. However, that pressure is good. It will help you create an informed decision on what to purchase before you purchase anything...
Think Ahead
It's best to have a vague idea as to what you want your space to look like before you pull the trigger on buying furniture. Focusing on your design intention prior to committing to a purchase will help you avoid dealing with future annoyance. You wouldn't purchase the pieces of a puzzle without know what it's supposed to look like prior, right?