Frankly, don't expect to be able to type all that much faster than you already are without extreme measures (unusual keyboard layouts, stenography, etc.) - you're already well above average.

Typing 110-120 wpm, your fingers are hitting ~10 characters per second which is a pretty impressive feat if you think about it; most people will never be able to achieve much beyond that, even with dedication & practice.

One thing you can do is ensure you have a decent keyboard that you're comfortable & familiar with. I'd recommend a mechanical keyboard with Cherry MX brown switches (light tactile feedback without the annoying 'click' of blue switches) - but ultimately, keyboards are highly subjective.