For example, you have a number like 83954276, which you can memorize as farm-bell-rain-cash. Which you can encode in your mind as a farmer selling cowbells at a market during a storm.
The hard part is turning a 8 digit number into a story, but with enough practice, you can do this in milliseconds.
Now I'll take a random excerpt of information from Wikipedia.
"Ham Wall is an English wetland and National Nature Reserve located 4 kilometres (2.5 mi) west of Glastonbury on the Somerset Levels. It is managed by the Royal Society for the Protection of Birds, which helps coordinate conservation issues across the Somerset Levels as part of the Avalon Marshes Partnership"
We can break this down to key points: Ham Wall, wetland, 4 km west of Glastonbury, Somerset Levels, Royal Society for the Protection of Birds, Avalon Marshes Partnership.
Then we can encode this to wall of pigs, murky puddle, sear (04 km), a glass coffin (Glass-bury), a sunset (Somerset), an overdressed person wearing a bird costume (Royal Society for the Protection of Birds), Excalibur buried in an apple (Avalon).
With a bit of practice, you combine this into one image, e.g. a wall of pigs in a puddle west of a bird-costume guy searing some bacon at a funeral, with the deceased holding Excalibur, during a sunset.
If you really want to encode this better, more macabre, shocking, lewd details work better, but I'll leave that to your imagination.
