I definitely go back and forth with the same ideas. I think something that really helped me was to set as concrete goals as possible and define what I value. Instead of saying "I want to be FIRE asap" I took time to think about what my ideal day would look like if I was done with work. I wanted to be able to run on sunny days, wake up and have coffee without needing to rush out the door, spend evenings with friends, enjoy the city I live in, etc. I realized that I actually had time to do those things now while still being well on my way to FIRE pretty early.
I work on keeping my savings rate high and not making purchases without thinking about what is really important to me. I am also still young and married with no kids (28), and it is important for my wife and I to travel to a few places without children in tow. Some may say it seems contrary to FIRE goals, but it really isn't. We travel hack and use airbnb, pay cash for our trips, have no car payments or consumer debt, and live in a house $100k under the median for our area. We sacrifice on things that aren't important to us (cars, housing, etc) so that we can enjoy what is (travel, time, family, friends). Some things are more now-or-never (traveling without kids), so we prioritize them without sacrificing our high savings rate. People will change, income will change, economies will change, and personal goals will change. Prioritizing what is important to you now AND in the future do not have to be mutually exclusive.