Late to this, but the Timeshifter app has changed my life; I’ve used it for passing through 8-9 time zones in both directions on three international trips - a change which normally has me wiped out. You input in your flight information, what your normal sleep patterns are, and it maps out what to do and when to do it, for two days in advance and the day(s) of travel, plus the following day.
Exposure to light at specific times (and avoiding light at specific times) is key, and when to do so is not always intuitive.
If I’m home in my pre-trip phase and I’m in an “avoid light” time period, I use the light blocking goggles you get after an eye exam that fit over my regular glasses, close my curtains and keep as many lights off as possible. (On the day of travel I just wear my prescription sunglasses indoors and on the plane so I don’t look totally bonkers.)
As an example of light timing - I just returned from Japan and during our flight home (per our apps travel plan) we were to avoid light, and go straight to sleep with eye masks on as soon as the flight took off. The rest of the plane was having dinner and wide awake but I popped on headphones with some soothing white noise and low music, and set an alarm on my phone to wake up later and put on my eye mask. After serving dinner they dimmed the cabin lights so everyone could sleep the rest of the flight.
After sleeping 4 hours (at 1am Japan time), per the app we woke up, turned on our seat lights, and turned on our phone flashlights and directed them at our faces, and watched movies. It was time to get as much light as possible into our eyeballs! Had a cup of coffee or tea every other hour or so (and kept the flashlights shining up on our faces as the attendants asked us not to raise the window shades).
No jet lag the day after getting home.
Anytime I’ve followed the program I’ve been fine, and I’ve tried a lot of different jet lag remedies over the last many decades (anyone remember the book “The Jet Lag Diet” from the 80s? 
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You can pay for the app for unlimited travel, or you can do one trip at a time for free (and I’ve done all the trips for free as it’s been about one a year, rather than one after another).