Any type of work can be meaningful. It is the spirit in which you do it that makes the difference.
Things just happen in the right way, at the right time. At least they do when you LET them, when you work WITH circumstances instead of saying, "This isn't supposed to be happening this way", and trying hard to make it happen some other way. If you're in tune with The Way Things Work, then they work the way they need to, no matter what you may think about it at the time. Later on, you can lookback and say, "Oh, now I understand. That had to happen so that THOSE could happen, and those had to happen in order for THIS to happen..." Then you realize that even if you'd tried to make it all turn out perfectly, you couldn't have done better, and if you'd REALLY tried, you would have made a mess of the whole thing.
Accustom yourself every morning to look for a moment at the sky and suddenly you will be aware of the air around you, the scent of morning freshness that is bestowed on you between sleep and labor. You will find every day that the gable of every house has its own particular look, its own special lighting. Pay it some heed if you will have for the rest of the day a remnant of satisfaction and a touch of coexistence with nature. Gradually and without effort the eye trains itself to transmit many small delights, to contemplate nature and the city streets, to appreciate the inexhaustible fun of daily life.