'you are of more value than many sparrows' [Luke 12:7(RAV)]
A flock of them live in an overgrown hawthorn bush near where I park my car. There must be at least two dozen of them and I can't tell one from another. They chirp away in rain or sun and busily hop from branch to branch. I often sit for a minute and marvel at their intense activity.
When staying with friends in an Oxfordshire village, I noticed hundreds of starlings congregating in two tall trees nearby and what a chorus of twittering! They must have come from miles around.
Next time you begin to feel the worthlessness of it all and start worrying when you know it does no good, go and see a flock of birds. In God's sight you're of more value than them all and if He cares for them, He'll look after you.