One simple rule to learn about reality is that there's almost always some kind of exchange that happens when attempt to obtain something.
We can frame this in terms of purchasing things, but bartering may be a better example. Purchasing something implies we have a specific and universal currency, and bartering implies that we give something that has equal value.
At the bare minimum, you'll realize that you spend your time on doing things. We all have a finite amount of time in this form, and when we learn new skills or work or sleep or do anything at all, we spend our time doing that.
Another example is this: many people are introverts and get their energy replenished by spending time alone or at the very least, doing something quietly while others are also doing something quietly. (I'm in this category.) Yet some of us introverts are also married to very extroverted people who are also quite loud and energetic (my husband is in this category).
I have a happy marriage, yet my marriage comes at the cost of not having a lot of time by myself. This exchange is, of course, absolutely worth it (I'm much happier with my husband being in my life), but that doesn't mean I don't have the need to spend time alone.
Today's question might be something like, what are you exchanging in your life? What are you giving up for the sake of gaining something else? And if you're honest with yourself, is it worth it?