Here are some clever twitter header images. Instructions on customizations below.
It applies to mobile and iPad / tablet as well!
Customize Header Image
1. Go to settings.
2. Click on Design on the left.
3. Upload a 1252×626 image at 72 DPI. I tried higher DPIs and it didn’t work (unlike background which allows it).
Just note that the final version has a light black mask over the image, so that the white profile text will pop. While keeping that in mind, either brighten the image to compensate or make due.
P.S. Remember that social is only 1/3 of the potential traffic. Search and word of mouth are the other two, so don’t neglect them.