The BBC has done a documentary about this, though I can't recall the name of it now. The only one that comes up in searches is How Smart Are You but that's not the right one.
If I recall it came down to simply breaking routine. I'm not kidding.
One specific example I recall was they asked people to make a chocolate sandwich (which they claimed was popular somewhere in the UK) in a way they wouldn't normally. If you butter the bread and then pour the chocolate sprinkles on, then try buttering the bread, pouring the sprinkles onto a plate, and mopping up the sprinkles with your buttered bread.
My advice would be:
If you always make the same breakfast, try making something else or preparing it in a different way.
If you always walk the same route to work, take a different route.
If you take the bus, try taking a different combination of buses.
Take a second to ask yourself what your daily routine is, and then find a few things - as many as you're comfortable with - and find a different way to do those tasks.
If I recall it came down to simply breaking routine. I'm not kidding.
One specific example I recall was they asked people to make a chocolate sandwich (which they claimed was popular somewhere in the UK) in a way they wouldn't normally. If you butter the bread and then pour the chocolate sprinkles on, then try buttering the bread, pouring the sprinkles onto a plate, and mopping up the sprinkles with your buttered bread.
My advice would be: If you always make the same breakfast, try making something else or preparing it in a different way. If you always walk the same route to work, take a different route. If you take the bus, try taking a different combination of buses.
Take a second to ask yourself what your daily routine is, and then find a few things - as many as you're comfortable with - and find a different way to do those tasks.
Edit: I think it was How To Make Better Decisions, which up on Youtube. https://www.youtube.com/watch?v=rirW96NM6HM