1. What are you goals for the next 12 months? Do you have any physical health goals? Do you have any other goals about improving your character and personality?
2. What are some things that you are passionate about?
3. What are some things that have intrigued you and you've always wanted to try?
About your D, I get that it's hard at the moment not to be bummed out. But, you have to learn how to put your game face on when D is around and push everything about you on the side. It's easier said than done, trust me I know. Are there any activities that D loves that you could do with her? Does she have any extracurricular activities that you could do or you could start some new ones?
You have to be the best dad you can to your D. Think of yourself as a single parent now when she's with you.
Honestly, make a list and if you like to journal, do it. If journaling is not your thing, that's okay, but do something to remind yourself of the great things you're doing every day if you can.
All of these small steps will help you emotionally and mentally. As they say here, this is a marathon, not a sprint. The journey is important for yourself.