What's the best way I could increase my cars horse power?

I have a 2014 Honda Accord Coupe 4 cylinder that I bought a little while ago. The horsepower is about 185 and I wanted to know what was the best way I could kick it up to around 230-240?

Nitrous Oxide Injection is easiest and cheapest. But it works for the very short period.

Next is turbocharger. Require lots of equipments, mechanics, time tuning. "Light" turbo may boost 10%-15%. The more power boosting, the higher chance the *original* engine will be "destroyed".

BEST Way? Sell it, and Buy a Bigger, more powerful car

Little things, don't sink too much money into an accord. Just do simple things, add a better air filter, or some new exhaust. It's a 4 cylinder though, so there isn't really much you can do to make it fast. However, they sell these chips online that plug straight into your car's computer, and will give you about 60 more HP.

Trade it for the 6 cylinder. Seriously, why didn't you think about the need for hp before you bought it? Did you not do any research at all? Take it for a test drive? It's a 4 banger. Deal with it.

This car is still under the factory 5 year 60,000 mile power train warranty. Modify it at your own risk as you just might void the warranty. You really want to take that chance?

Any changes need to be notified to your insurance and will void your warranty.
It will cause other things to start breaking.
The Honda goes well enough already.

Best way would to be jack up the radiator cap and put a more powerful car under it.

Work lots and make lots of cash because the mechanic wants the money.