Sweets and chocolate. They make me feel so good.
Bike related, ASDA brand flashing lights. Cost about 27p for a pair, the lights last long time, rarely allow water ingress and will usually see a number of successive winters through. Where ASDA could teach the big name branded lights a thing or two though is the bar mounts. Presumably the ASDA ones cost 0.01p to make but they last forever, unlike one of the big name brands which will cost you about twenty quid and last five minutes.
And my ALDI winter jacket. Picked it up while I was browsing those big trays one day for about 15 quid, I haven’t needed another warm winter coat for cycling for about 7 years because it’s freaking ace. I keep thinking it’ll need replacing each winter but no, it just keeps on giving.