How should I go about preparing to travel for 12 mo. + ?

I'm not interested in doing it in the too near future, but I would like to eventually save up enough money or prepare myself to go on an extended traveling expadition. The only thing is, my boyfriend is pretty grounded and in order to make this in any way apprealing to him, I need to know how to prepare for something like this, what to save, what to expect, job situation, etc.

I know every situation is different, but any information would be helpful. Even if we don't wind up going for a year, I think we're still both interested in at least a few months. Thanks!

Edit: I've already tried to comb through as many Reddit posts as possibly, but I figured I'd post something of my own to see if I possibly missed anything.