Plan your groceries shopping (do evening or at night) especially to maximise daylight travel / normal attraction opening hours.
Bigger supermarkets (usually 8 am till 9 pm on weekdays):
+ Coles
+ Woolsworth
Others:
+ ALDI
IGA / SUPA IGA :
- at Applecross (Canning highway) 24 hours
- at waterfords plaza (manning road / curtin uni) until 11pm daily
- at Victoria park (behind San Churros) till 12 pm
Spudshed opens 24 hours:
Bentley Plaza (on the way to City from Airport)
Coventry village (near airport),
Innaloo (near Ikea / north)
baldivis (south of Perth).
http://www.spudshed.com.au/contact-us/
Asian Supermarket/ Shops - google asian or oriental shop to find one near you
(Useful to get spices / asian food)
One near airport - NP supermarket in Cannington (Asian shop) - 6 am to 11 pm. Also offers a good range of vegetables / fruit.