Well, nearly empty. I've always focused on making desktops as spacious as possible for the stuff I use. Screen space is a real issue on screens with smaller resolutions (like my 1366 x 768 laptop).
So I've been working on this the past few days and I've been happy with the result.
1. The green bar on the right is my power meter. The windows 8 battery icon is ugly and also not centered (what's that about?). I made the bar by modifying a rainmeter skin for a battery bar. It's only 1px wide! (Source: Lines)
3. My music player on the bottom right is Winamp and it is a skin that I made for myself. I just need to see the name of the song and a seekbar would also be useful. The rest of it I control with the keyboard. Pixel fonts without antialiasing make it possible to see both the fonts in Winamp and the clock from a distance without problems.
4. Reduce eye strain at night with f.lux
7. Win + C for clock (Windows 8+ only)