I think you should also consider whether this is a worthwhile use of your time and mental energy. Falling into and then waking up from a long-term coma is exceedingly rare, but making sure your goals are transmitted may be a relatively time-consuming and difficult endeavor. And, as others noted, those goals may end up being irrelevant to future-you and the future-world. Couldn't those hours be better used working towards your goals now, or (for example) becoming a safer driver so that you don't fall into a coma in the first place?
Reading a Reddit thread about the experiences of people who woke up after a long coma, got me thinking. If something similar happens to me, I might wake up with a significant portion of my memories gone (not to mention changes of personality). The question is, how do I make sure that the amnesiac future-me will continue to pursue the goals of present-me?
This can be divided into 3 sub-questions:
Any suggestions?
PS. You may ask, why am I focusing on goals? I'll just let agent Smith speak for me.