How to find out when my car requires maintenance?

I bought a new Honda and when I read the owner's manual it just says to rely on the maintenance computer to tell me. But I want to know in advance what miles I will need Tune-up, new spark plugs, fluid changes etc. But none of this is covered in the owner's manual!

So how do I find out about what mileage I will need to perform these services?

Go to the Honda dealer. Ask them what services they do at what mileage.

Look in the index under "maintenance schedule". If it's not listed ask a service writer at the dealer.