via: Photoshop User
Make certain that you're using the appropriate resolution for your files. It's amazing how many people design Web graphics at 300 ppi. Try these Adobe recommended Resolutions to give yourself and Photoshop a break.
| Output | Resolution |
|---|---|
| Mac monitor | 72 ppi |
| PC monitor | 96 ppi |
| 300-dpi printer (laser) | 100 ppi |
| 600-dpi printer (laser) | 150 ppi |
| 725-dpi printer (inkjet) | 150 ppi |
| 1200+-dpi imagesetter | 2x the screen frequency (lpi) value-specified |