If you live in a place that already has a good number of bees around: have pollinating plants, trees, bushes in your yard, possibly a (small) stream of water; know how to spot a swarm and have a bee-friend that you can call to collect the swarms.

Depending on where you live, seeding your lawn with white clover is a low-cost and low-maintenance way to provide food for local bees.

grow plants pollinators like

https://thehoneybeeconservancy.org/plant-a-bee-garden/

Leave the dandelions in the lawn for the pollinators. They attract tons of bees, bumblebees and butterflies.

I guess I did good by getting sick for a month right when spring was starting and between that and the rain I didn't bother mowing for awhile and the dandelions took over the front lawn :)

they are also very tasty (you can eat many parts of them), and they will grow again if you leave the root in the ground :)

Bonus: Dandelion wine

Grow locally native pollinator plants if you can, or any flowering plant.