What are some things i can do to my 2012 honda accored to give it more horse power?

My car is weak, it does alright with just me in the car but it needs more power so i can carry passangers and things in the trunk with out losing so much power. I enjoy driving fast and all though i know i don't have a race car or anything i enjoy upgrades because its more rewarding to customize a car then to buy it already done. I've already added a cold air intake but it only added like 15 to my HP and i was looking to bump it up about 150 more. My car is currently at 155 and i think 305 would be satisfying to me plus give me the pick up i need when i have passangers. I do enjoy a more throaty sound and the cold air intake made it sound more so, i'm bot going to rice it out but i would enjoy hearing my engine more.

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