I hate to burst your bubble, but here’s a list of the biggest mistakes I see sellers making when trying to sell a home

Not approving showings, even the last minute ones. If buyers can’t see it they won’t buy it.
Cluttered spaces. Even though buyers know your stuff doesn’t go with the house, lots of clutter ends up being a huge distraction.
Unwillingness to negotiate on price, timing or other factors. Buyers need to feel like they are “winning” too and most expect a seller to negotiate some. Build a little wiggle room into your price but not too much
Unpleasant odors. This is a biggie! Cigarette smoke and dirty litter box top the list of offensive odors.
Unwillingness to make repairs. If it falls into the category of “any reasonable buyer would want this fixed” it just makes sense to fix it!
Pricing too high. This is probably the most important factor. A home priced too high will not sell and might even help other homes sell quicker and for more money.