If you want a life without regrets, work backwards from the day you die until today.
What do you want your life to look like at the end? What will make you proud? What legacy do you want to leave behind?
Once you have the end think about where you need to be 5 years prior to the end. What needs to be in place, and what are you working towards in those last 5 years to end up where you want to end up.
Continue this process of 5-year chunks until you get to today.
This isn’t a process you do once, you do this process over and over. The first time, visualizing what you want your life to be like at the end will probably be unclear. As long as you have a glimpse you can work backwards. The next time you go through the process, the end will be clearer.
Even if you are doing this process once a year, after 10 years you are going to have a very clear idea of what your life needs to be at the end so that you have no regrets.