Restart your MacBook regularly
Close unused apps and browser tabs
Update macOS
Update all apps
Free up storage space
Empty the Trash
Remove large files you no longer need
Delete unused apps
Disable login items
Reduce visual effects
Check Activity Monitor for heavy processes
Clear browser cache
Keep the desktop uncluttered
Run Disk Utility First Aid
Scan for malware
Reset SMC and NVRAM if needed
Use Safari or a lighter browser
Keep your MacBook cool
Replace an old battery if performance is throttled
Upgrade to an SSD if applicable
Increase RAM if your model allows it