Deep clean, remove personal clutter and make small repairs like fixing leaky faucets, chipped paint and loose door handles first, since these are the items that show up in almost every buyer walkthrough regardless of price point or neighbourhood.
Curb appeal comes next: mow the lawn, clear the walkway of snow or debris depending on the season, and make sure the entry is well lit and welcoming, since a buyer's first impression forms before they are through the door.
Skip large-scale renovations unless a lender or inspector specifically flags a structural or safety issue, since most major projects do not return their full cost at sale. Get your hand-reviewed valuation from Joel Dyck.