Second the de-cluttering. The first thing our realtor told us to do is rent a dumpster--it was $150 for 2 weeks for a "half dumpster" and $300 for a large one. They deliver it, you dump your trash and they come pick it up 2 weeks later.
We took the stuff that had no value and couldn't believe that we'd filled up that dumpster 2 weeks later! It's amazing how much stuff we'd accumulated over the years that was just trash and junk.
Anything that had value we tried to sell at a garage sale. We made enough $ to pay for the dumpster.

Everything that didn't sell, we took to Goodwill.
Even after doing all that, our realtor said our house was still too cluttered when we got ready to sell it. So we rented a 5' x 10' storage space for about $70/month and filled it full with stuff we wanted to keep but didn't need while we were showing the house.
After that, our realtor helped us "stage" the house by bringing over some pictures and doo-dads she had in her garage.
(I know this isn't your question, but as you can tell from me mentioning our realtor 3 times so far, I think it's money well-spent to hire a realtor. In addition to the outstanding tips she gave us on de-cluttering and staging, she helped us get good renovation help at an affordable price, took care of the advertising and open house, managed the offers we got and got all of the paperwork in order, and perhaps most importantly rode herd on what turned out to be a very complicated process of getting our house closed and getting our new house to closing in a seamless way. I know that not everybody has that good of an experience with realtors, but it was the best 6% we ever spent.)