As a living person, much of your day's devoted to covering your tracks, but once you're dead, who's going to hide your smut and drugs? Two solutions that'll transmit your wishes from beyond the grave: PostExpression and JustInCaseIDie.
Post and JIC both let you compose post-mortem messages (love, last wishes, whatever), which are held in impenetrable secrecy until after you kick the bucket. Each offers its own unique features and release mechanism, so choose wisely:
PostExpression: Post lets you craft multiple diatribes set to go to the special person/people of your choosing -- either immediately after you croak, at a set time following death, or on a particular date. Post-mortem maneuvers get invoked by a password-holding "Keyholder"; it's wise to pick someone younger, healthier, and less alcoholic than you. So not Dennis Haskins.
Best for: People whose only pal doesn't constantly try to remember Sammy Jankis.
JustInCaseIDie: Like some complicated action movie "insurance policy", JICID requires you confirm your livingness by responding to email scheduled for the date of your projected/prophesied demise. Don't respond to the reminder and your message goes out (respond and you can then re-set, and eat way more pills next time).
Best for: People who'll have the same email address for eternity.