If folks really want to make sure they come back from the dead, they might also think about setting up proper incentives for performing the potentially highly laborious process that resurrection might entail even 100+ years from now. It might be helpful to place a sort of back-to-life bounty on yourself, to be held in escrow, and only to be paid out upon successful resurrection. The bigger the bounty, the higher your de-facto priority in the queue. Let it collect interest and fund the ongoing administration of your bounty in the meantime.
If you really want to make it stringent, make the bounty require a password that only that (deceased) person knows. Best case scenario they do such a good job resurrecting you that you still remember the password, or at worst there's an incentive to picking the fact out of your brain, which might be only slightly less difficult than doing the full resurrection.