This is great advice.I think it's part of NF's curse to suffer from this syndrome, even though there are slightly different approach for between Ne-dom and Ni-dom.
What works for me is to unlearn GiGS by bringing myself back to the present. And I have two suggestions:
1. Practice gratitude.
Gratitude isn’t just a feeling, it’s a practice. When you’re feeling grateful, it’s because you’re noticing what you have in your life that you love, and that makes you feel loved. Most of us think that gratitude, happiness, peace and all the other wonderful things we want to feel just happen to us, but that’s not the case. Our feelings are always a result of our thoughts.
You can get into the practice of creating gratitude by asking yourself questions that focus your awareness on what you love in your life. So ask yourself, “What are the things I wouldn't give away at this moment? What went well for me today? What makes me feel very blessed in the present?” And if you are feeling dissatisfied, ask yourself, "What's important to me now? What do I need to fix it? How do I already have that in my life in places where I haven't been noticing? And how can I bring more of that to my life now?"
When you contemplate these questions and answer them honestly, you’ll experience authentic gratitude.
Then try to write a few positive things by noticing the smallest gratitude in written format (I would suggest no more than 3). And the next day, add a few additional things on a separate list, along with the previous points. So that within a week, you'll have a pretty good list of things that you felt grateful and keep brining you back to the present.
2. Practice mindfulness.
I think sometimes we forget the whole point of happiness, and mindfulness is part of it. Essentially, it's being happy no matter where you are in the world, or what you're doing, or whom you're with. Being mindful quiets the mind and brings us a sense of peace that no other quest for a "perfect life" could ever bring.
The way to achieve this is to balance our energy. Whenever you felt GiGS is hitting you hard, convince yourself through rationalization that our thoughts have feelings attached. Sometimes the feelings make sense. But many times, our feelings are out of sync with our thoughts. So whenever this happens, re-read the gratitude list you've created. This will help you to balance both spheres of 'contentment of present and exploring "what ifs" from the future. Remember you do not have to forcefully to pull away your Ne's optimism because that's part of your dominant function. Learn to embrace it by balancing both present and future's mindfulness as one single entity.
This way, mindfulness helps you to appreciate life as it happens. It stops us from agonizing over what might've been or what could be. It just brings us back to the present.
So next time, when you are looking for a different situation, look within yourself by shifting the focus of thoughts and feelings. Remember that happiness isn't having what you want, but it's about wanting what you have already. Since mind is a powerful thing and positivism is such a rare gift among Ne users, learn now to stay positive in the present so that you will become a magnet for the greener grass and you won't have to go "over there.' It will come to you eventually.
Edit: When you practice mindfulness, try to breath very slowly and listen to your own heartbeats and breathing patterns as it can enhance the power of synergizing both energies as one.
Recognizing that others exist in this world is a great way to slow down my days.
Utilizing Ne in conversate with those I love most and let them know I care.