#45
Don't neglect Retina optimization
Hot Tip #45 is don’t neglect Retina optimization.
Simply put, Retina Displays have higher density pixels, needing a bigger version of the imagery to appear crisp.
Haptic
Clear infographics and crisp app screenshots leave a wonderful first impression, especially if your target market is designers.
Responsive Images - Developer Eric Portis details exactly how to deliver @2x images on Retina screens.
ImageOptim - My go-to for image size optimization for JPG, GIF, PNG and SVG.
BGJar - Free online tool to create colorful SVG blobs.