Clutter is tough to manage, but a simple solution like this shoebox wall looks great and puts things in their place. Much like museums, using similar boxes for similar items makes them easy to store without looking terrible.
Shoeboxes can be great cheap solutions to fit stuff like cords and miscellaneous items that don't fit in folders. In her book The Creative Habit, choreographer Twyla Tharp described her creative process and how when conceiving ideas for a new show, all the inspirational source material goes into a big box. Designer Dave Seah, stumped on how he could organise and compartmentalise his projects, ran with the idea and realised he could organise his clutter like that as well.
In order to keep a consistent look, you could order parcel boxes in large batches. This will help you organise your stuff neatly in an easy-to-access system.
Project Shoebox: Making a Physical Filing System [Dave Seah]