Weekly routine for me depends really on time.
Normal routine is hose of lose dirt, wash the paintwork with 2 bucket method and lambswool mitts, rinse with Autoglym Autogloss rinse and a sheeted of water from the hose. Dry with a waffle weaves towels and a spritz of Meguiars last touch quick detailer.
Wash wheels with car wash solution, wash mitt and Halfords wheel brush. Spray in arches and tyres with Meguiars all purpose cleaner and scrub, rinse and dry.
Quick detail the paintwork, clean the glass and dress the tyres.
Wipe the interior trim down with with damp Microfiber and or Interior Quick detailer. Wipe down leather and alcantara with a damp cloth.
If time allows apply a coat of spray sealant like Optimum Car wax and or a coat of carnuba wax.
Bigger details:
Once a year clay, paint cleaner, deep clean machine polish and swirl remove, sealant and wax. Clean under body.
Once ever 2-3 months or before a show or event. Light polish or Glaze by hand or machine, re-apply sealnt and wax. Deep clean of the wheel arches, polish and seal the wheels. Clean and UV protect all interior plastics with a good dressing. Clean and condition/treat the leather.
Before winter apply 2 or 3 layers of a decent sealnt and top with heavy wax.