[csandbothe]

Hello all. We recently put hardwood floors in our family room, and the acoustics are much more lively. Aside from the obvious area rug/pad, are there acoustic treatments you'd recommend that don't look like large black cylinders in the corner?

[toocool4]

The corners are an insignificant part of the problem, the whole wall is the problem. I don’t know why people think the corners are the problem, the corner is a tiny area of the whole wall. Covering a tiny fraction of the wall, which is what the corners represent will not help, we all know quantity is the key here. So address the larger picture will help.
Find some acoustic panels that look like art and is acceptable to your wife, to put on your walls. You can even have your own art printed on the panels.

[artur9]

There are some room equalization electronics designed to help specifically with that situation (Linn Space Optimization, Lyngdorf RoomPerfect, others).

What's your budget to address the problem?

Carpet obviously helps.  If your couch is against the back wall, moving it away from that wall helps a great deal, if there are windows acoustic curtains help some, artistic acoustic absorbing panels as mentioned....

[Tyson]

GIK Art Panels:

[Early B.]

We need more information, and pictures of your room would certainly help. What are the room's dimensions? For instance, if you have many windows, thick curtains may help in lieu of acoustic panels. 

[AllanS]

Unless you know what problems you’re trying to solve, I’d advise against arbitrarily adding room treatments.

[Charles Xavier]

When I treated my new stereo room, the biggest improvement made was adding treatments on the ceiling.

[WGH]

I put a thick handmade Oriental carpet on the wood floor, a couple of ATS Acoustic panels on the rear wall, a colorful Mexican blanket over the big screen TV and a firm but comfy Copenhagen Tammy leather sofa in the center for listening, lounging and TV and called my room treatments done. Sounds damn good and none of my friends think it looks weird.