Presence is treating now like somewhere worth being.

Most of the time now is treated as transit, a place you pass through on the way to somewhere that counts. Presence is the decision to treat the current moment as a destination, which changes nothing about the circumstances and everything about whether you are in them.

Pick a routine part of your day that you usually spend getting through, the commute, the dishes, the walk. Treat it once as somewhere you are rather than something in the way. Notice what was there the whole time.