Paying attention to finances has always been a thing for me. Even with that said though, I don't often do it in an organized way that gives me a clear picture.
Mostly I just think about it in my head and loosely add things up. Granted, this is based off a foundation of laying it all out in a spreadsheet years ago, but that needs to be reviewed every so often.
If you don't, you will often find that there are more expenses than you thought and your income may not be what you think it is (assuming you have multiple income sources, not just one set job).
I did a review this morning by laying out all the information on a fresh spreadsheet.
The good news is my expenses did shoot up in any substantially way which I was worried about.
The bad news is my income didn't move up much since the last time either.
At the end of the day, it is good I did the review and I suggest everyone does this at least once a year in my opinion, if not more often.