Understand the finish
Check the label for wash temperatures, colour transfer and drying instructions. A dark or untreated denim may behave differently from a washed one.
Inspect high-wear areas
Seams, pocket edges and hems can show wear first. Catching a weak point early gives a repairer more options.
Plan repairs carefully
A patch can be visible or discreet depending on cloth and technique. Ask a professional before altering a valued pair.