Price is the number 1 thing to consider before selling your home. It will likely determine whether your home sells at all. The idea is not to leave any money on the table, but to price correctly so that you solicit bids on your home as quickly as possible.
Selling a house can be a painless process if you follow the advice of someone who has sold hundreds of homes. And at this point, I've sold so many homes that I usually know what the pain points are going to be before putting a home on the market.
Let me jump in here and say that obviously whether your home sells on the first day, or quickly (which is probably a better expectation) has a lot to do with market conditions. If there is a lot of unsold inventory on the market, or your home is uniquely difficult to sell (think 1800's farmhouse or a condo that will only appeal to a select demographic) then taking a few months to sell should be expected. I can layout better expectations after viewing your home and reviewing your specific market.
If you want to sell your home fast, and for the most money possible, price is an important consideration. One of the most common fallacies that I see sellers make is to list their home a little bit higher to leave room for negotiation, and that's usually a mistake.
Many sellers think they are taking all the right steps when getting ready to list their homes. They research and hire a great REALTOR (hopefully from Slate Realty), they declutter and organize their home, they use professional listing pictures and they put it on the market. But most forget about one crucial step: staging. Properly staging your home is one of the best ways to make buyers fall in love with your home and showing them all of the possibilities space offers.