What's the easiest way to resurrect deceased sims now?

You can download a plate of ambrosia from the gallery and have the ghost Sim eat it. Quickest gameplay method I think is the wishing well or dedeathify spell.

Have a spellcaster cast dedeadefy or brew a prompt resurrection potion.

Use the wishing well from the romantic garden stuff pack if you own that pack. I needed a few tries so I saved just before making the wish so I could do a exit without save if needed.

Magic - as usual - is the easiest way (besides outright cheating). The potion might be an easier sell than the spell itself (given the progression necessities), but either way it's easier.

Death flowers, pleading, and Voodoo Dolls require you being there as they die.
The Book Of Life requires forethought.
Ambrosia requires work.
The Whispering Wishing Well requires monetary sacrifice (and even then it isn't guaranteed).

Oh I'm not beyond cheating...LOL...I'm God afterall in the game so whatever I want is going to happen. But so many of the things do require forethought or you being there. I just was hoping someone made a simple mod to undo some of this stuff.

If you don’t want them to die in the first place, you can turn off accidental death by story progression.

You can also just remove the "Death by ___" trait with cheats/mods. This makes them alive again.

Many good suggestions here. I just want to say I'm going the ambrosia route in my game and I think it will take the whole life time of the poor girl to get her boyfriend back :D I don't mind really, gives her something to do.

In my game I have quite a few retail locations, one of which is a magic shop that sells all the potions and another of which is a very large grocery store which sells prepared meals in addition to produce, eggs, milk, etc. So...if I ever really want to bring a sim back, I could have any household that I play buy the resurrection potions from the magic shop or ambrosia from the grocery store.
I've yet to do that though, seems a little 'too easy' at that point. :lol:

I re-created my sim self’s parents in CAS from old screenshots and used MCCC to link them up to the family again.