[Closed] Car servicing - non dealer requirements for warranty?

Helped mother in law select a new car just under a year ago. Peugeot 107 auto.

Car has done about 3k over this time and will obviously need a service to protect warranty.

So....what does nice and close Indy garage have to do to ensure no future warranty issues?

Use oe filters?
Follow service checklist?
Stamp the service book?
Correct oil?

Anything else?