Best "hack" I've heard is to NOT TRY to go to sleep. It is involuntary. It is not something you can will. The harder you try the further back it moves.

Instead, simply focus on creating an environment conducive to sleep (safe, warm, comfortable, etc.).

e.g. Try not to have an active going to bed ritual (such that a bunch of business abruptly ends with the expectation of sleep), but more of a "coming in for landing" ritual, where you need to do less and less until your mind decides it might as well sleep since there is nothing to do.