Something I have not seen very many uploads of are aging mods that make lifetimes shorter.
Aging mods that I have found usually give extra days, and does not lessen the sim's lifetime.
Why I made this:
Teens already have a ridiculous amount of time! >.<
I don't want to send all my teens to Uni, but I also really did not want to play through 15 days for every teen!
This was a large issue and a hold back to me on allowing my sims to have lots of babies.
So I decided to change that by modifying all of the sim ages to my personal taste.
Again, this was made for my use primarily so this may not be your cup of tea.
As you can see almost every age has been changed except toddler which I found already worked quite well.
You will notice teens, adults, and elders have lost a significant amount of days.
This was done in effort to make the usage of the Elixir of Life aspiration reward more worth while for adults.
Changes were also made so that having adults in gold or silver when they age into elder-hood is no longer bothersome.
This means no more elders being in meditation for 20+ Days with me waiting for them to die :<You can only have one Aging mod at time!
Aging mods do not work well with Inteen!