Palms, tropical plants and botanicals are on trend right now. Design Love Fest has some free printables that you can download to create your own tropical decor touch. Print them at home, or take them to your local print shop and have them done for you. It's a simple way to add a green (or blue, even) touch to your decor.
Put them on your walls naked like you see here, or consider a few framing options. If you have them printed in a standard size (8x10, for example) you can buy standard picture mats and frames, and replace the print down the road when you are looking for some thing new for your decor. Get the downloadable file over at Design Love Fest.