What maintenance do I need for a Honda Civic 2008?

I have a Honda Civic, year 2008, and it has 80,000 miles on it right now. I ve done all the oil changes and I ve had to change the battery one time. I m wondering what other work I need? The guy who did the last oil change says I need to check my transmission fluid. Another friend suggested I need new spark plugs. I know nothing about cars, and the manual doesn t really list anything specific other than an oil change. Unless I m missing something. I m just wondering if I should be getting tuneups or something like that. Thank you in advance!

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