@lighttrax spoons as a measure of how much energy you have - it's usually used by physically disabled people, but people like me with mental issues also use it...

the basic idea is: when you wake up, you have a certain amount of spoons. and doing any task costs you a spoon - getting out of bed, showering, preparing breakfast, getting dressed, going to work, individual tasks at work...

if you run out of spoons, that's it - you're incapacitated.