Write a dead man's switch script. You just have to remind it you're not dead once a month for example.

However don't do what a colleague of mine did back in the early 00s. after a motorcycle accident he was in hospital for three weeks. This was back in the days before ubiquitous internet access (horrible times!). His dead mans switch went off after two weeks and caused an email to be sent to his boss to call him a vacuous cunt. Obviously that didn't go down well at all.