Depends on what you plan to use your yard for, everyone is different.

Do you have kids or a dog?

Do you want to do a vegetable garden or some plants?

Are you looking to host outdoor bbqs?

What are your must haves? Space for a grill & dining or do you want an outdoor couch and a fire pit/chininea?

Also, take a look at /r/landscaping or /r/gardening for some inspo