I'm only speaking from my experience, but something that has helped me through this heavy grieving period is keeping a daily inventory. Not an inventory per se of numbers, but more of keeping in mind the good things in my life and matters that make me happy every day.
To me, if you don't look at that part of your life, you're overlooking a lot.
So I keep things in mind like my family and friends, my dog, my drumming, reading, writing, and exercising. Those are there every single day. And while I lost a lot and have been thrown for a loop about what I'll do in the future, I have to keep the constants in mind.
When you only look at what's missing from your life, of course your overall life will be lacking. I've been down that road before, and it's not worth it in the long term. Plus, worrying about the whens and wheres of the future tends to prevent you from enjoying the now.
I'd like to enjoy the now, even if it feels like a rollercoaster ride.