I spent years shopping at Shoprite not knowing there was a Tesco in town, or a B&Q just round the corner. The best chippy nearest to the paddock, the great places to eat Jo and myself have spent nearly a year (11 months and 2 days now) exploring.
I'll start it with the Tesco. It's obvious to people who are regulars there or like me are a frequent visitor but if you've not been before you wouldn't know, or know how easy it is to get to. If you're driving it's possibly simplest to go down to quarterbridge and turn left but there's traffic that way and traffic lights, the roadworks will hopefully be finished by TT.
Instead turn left at the crossroads at St.Ninians, take the first right (Woodbourne Road) and go down there past the schoolfield on the right down towards the terrace, where there's a good chip shop on your left - The Terrace Chippy. When you see the shops on your left keep going til you see Athol Street. Turn right there and within seconds you'll see the train station arches, at the bottom of there is Tesco.
That's me started.... Manxies put me right

Italian restaurants (my favourite), Indian, Chinese if you like that kind of thing...