After that, decluttering and a deep clean do the most for the least cost, since they let a buyer see the space rather than your belongings in it, and that matters more in the first days of showings than almost any other single change.
Minor repairs, a dripping faucet, a cracked outlet cover, a sticking door, matter next, because a buyer's home inspection, typically $400 to $600, will flag them anyway, and fixing them ahead of time reads as a well maintained home rather than a deferred one.
Start with the number, not the project list. Get your hand-reviewed valuation from Joel Dyck.