What service/maintance should be done on my 92 Honda Civic that s about to reach 300,000 miles on it?

Hi I have a 92 Honda Civic who I haven't done anything on since I got it 4 months ago it's about to hit 300,000 miles it's at 270,xx0. I don't know much about cars but what should I do besides an oil change? Get new spark plus? Should I buy other parts?

Read more: What service/maintance should be done on my 92 Honda Civic that s about to reach 300,000 miles on it?