Carry On Your Own Strategy
This well-intended idea from British Airways reminds me of companies that want their overworked employees to just chill out with mindfulness so they can be more productive.
While focusing on relaxation in the body will help (if practiced consistently over time as is true for any skill), nobody wants to learn new coping strategies from the people who they perceive to be orchestrating their immediate discomforts.
Watching the more mindful people in first class get their feet massaged with eucalyptus oil probably won't help either.
Once you reach cruising altitude or perhaps after your main meal, set aside time to develop a deep sense of calm and comfort through these meditation practices, to achieve a tranquil travel experience. See more here. Featuring mindfulness consultant Mark Coleman, founder of the Mindfulness Institute in California.
My Prediction
Unsolicited relaxation tips will result in increased agitation, resentment, and passengers defaulting to familiar, preferred numbing strategies.
My Recommendation
Carry on your own strategy. Make sure it accounts for present moments that are very likely to be unpleasant. And spend some time practicing it before you need it.
Bonus Tip
If you do find bliss in your tiny little seat, please don't tell anyone. Share it indirectly by being kind.