In my room I have an obscene amount of plants and I think it rly works with the vibe, especially if you grow them in water (in my experience pothos and coleus amboinicus work best, but you can do it with many plants, even stuff like sweet potatoes).
I rly like adding the little blue glass pebbles. Other than that having a nice fish suncatcher/windchime would be great, you can get little fish toys and hang them in between pieces of glass and just go wild with it, sadly I lost mine moving and this is the closest I could find. You can obviously play around with colour and transparency to make it match the vibe - I´d go for the obvious blue and green, maybe some orange, or maybe realistic fish and big pieces of glass.

Other than that I have prints of some frutiger aero coded images in my room and I have wallpaper engine on my computer (I have a desktop as opposed to a laptop, but you can do this on laptop also, you don´t even have to splurge on wallpaper engine for it) so I have a nice screensaver when I am not actively using the computer.