First thing I'd do is pull out all that Mondo grass - it's not a true aquatic and will eventually die off, leaving nasties in your tank.
The anubias/wood looks rather nice where it is. If you cleared the substrate around it in front and planted a low-growing ground cover like dwarf baby tears or mosses, it would help it stand out as a feature maybe.
Crypts are nice and pretty hardy. They do grow slowly, but can get quit big in time, so maybe those would look good near the back of the tank close to the wood (ah, I see you have one there already, I think anubias & crypts look great together..). You have height (with the wood) on that side.. so perhaps consider either some taller stems in the opposite corner to balance it and give contrast to the shape, or leave it high where the wood is, put the crypts and maybe some dwarf swords there to make it a bit jungly and then have some flatter but interesting rocks on the other side with some clumps of lower-growing plants.
The lily is too close to the front. They are such lovely plants - maybe put it closer to the wood, or by that large rock on the left as a feature with some low plants around it, but close to the back so it can be seen at a 'distance'. Large at back, small at front is a good basic rule.
I have been googling fluval nano scapes for ideas on composition.. lots of great pics out there - maybe check out a similar search for inspiration? Once you have the general shape in mind, it'd be easier to suggest plants to help make that look good.
Last edited by Aus; 07-13-2012 at 01:21 PM.