Simple garden projects for efficiency ?

What are the best things to make possibly out of wood to make the garden as efficient as possible and help maintain crops.
basically what are your best garden project ideas ?
thanks

Hey there, welcome to the forums. That's kind of a big ask, as we have a loooot of people doing a lot of super cool things in all different kinds of places.

Have a search around. Here are some threads that you might find interesting:

wee beds using wood for less watering
https://permies.com/t/218208/Mini-wicking-bed

simple gardens from a source some of us know and love
https://permies.com/t/163437/RED-gardens-simple-garden

this type of "what worked for you" thread appears regularly and never fails to give me lots of good ideas
https://permies.com/t/169096/garden-grew-differently-year

Raised beds.
Storage benches.
Work benches.
Colds frames.
Greenhouses.
Fences.
Sawhorses/Sawbucks.

This starts with the soil. start building the health of your soil.  One easy way is with wood chips.  Here is Dr. Bryant Redhawk's soil Series:

https://permies.com/wiki/redhawk-soil

Grouping plants by their needs, such as plants that need more water or plants that need more sun.

Plan what you will have in your garden, no impulse buying.

Have a good design.

Don't forget about weeds and let them get out of hand.

Using a wagon or cart to haul plants to the garden.

Don't forget about the kids, let them help in the garden and teach them gardening at the same time.