Forget the small stuff, for now. What's your big objective?
As January approaches, and we bid another year adieu, our thoughts turn to making resolutions: this year I will lose that extra weight, drink less alcohol, give up sugar, get out of debt. All worthy goals, but why do we perennially return to resolutions that seem based on the idea of fixing all the things we're doing "wrong?"
You can't know what resolution you need until you know what your objective is. In photography, the resolution of the image is entirely dependent on the output you want. If you're looking at an image on your computer monitor, 72 dpi (dots per inch) is fine, but if you want to print that image, you'll need a much higher resolution, say 240 dpi. If you then want to make that image into a billboard, you actually need a relatively lower dpi, because the further away you are from it, the more your eyes will blend the colors for you (think of a Georges Seurat painting).
Via Martin Gysler, Mido RaffierMöller, Aki Puustinen