Sadly, it’s not yet possible to send advice to your PAST self - but a new service lets you send ‘time capsule’ emails to your future self.
Futureme.org works like a simple webmail service, but lets you
specify the date when the message will arrive - be it a warning, advice, or
simply a ‘Hello!’ from the past.
'FutureMe.org is based on the principle that memories are less
accurate than e-mails,' says the site.
The site says, ‘Send your future self some words of
inspiration. Or maybe give 'em swift kick in the pants. Or just share some
thoughts on where you'll or what you'll be up to in a year, three years...more?
And then we'll do some time travel magic and deliver the letter to you.’
The site recommends using a Gmail address or other webmail
address, rather than a work one - your future self might well have changed job.
But you can also go back into your email ‘to the future’ and
alter it to ensure delivery.
The site allows you to send emails privately and anonymously,
but publishes ‘public but anonymous’ excerpts of mails sent to various future
selves.