Start with the boring wins
Most phones do not need a dramatic clean-up. They need fewer background jobs, a little free storage, and a charging routine that fits how you actually use them.
A ten-minute reset
Update the operating system, remove apps you have not opened in three months, and turn off notifications that do not help you decide or act. Then check which apps used the most battery over the last 24 hours.
The goal is not to make your phone feel empty. It is to make its defaults match your day.
Keep the habit small
Once a month, clear one drawer of unused apps and review battery usage. Small maintenance beats a panicked factory reset when the phone is already slow.