macbook proscreen capture
Problem: when I take Screenshots on my retina mac using the built-in screen capture tool and attach them to certain tools (Outlook 2011, HipChat, etc.), they are enormous.
Usually to get around this problem, I'll resize them using Preview or I'll take the screenshots using Skitch. But I'd love it if there was a way that I could simply select something from the right-click menu on the image and it would reduce the size to 1/4 (i.e., half the width).
Two of the best apps for this are CloudApp and Skitch.
Cloud app has an option to automatically upload screenshots (image courtesy of Softpedia). It is very drag and drop friendly and pastes the URL to your clipboard for convenience.
Skitch is a little more heavy on the screen snapping controls. It's like grab on steroids. You can quickly hide private information, point out items, and edit the snap before uploading.
The free version of both are well worth it. Both have paid upgrades that are low cost, but you don't need to pay to use either. I have also heard really good things about Droplr so you might check it out as well.
Both CloudApp and Skitch are available on the App Store. The two are better together - skitch is better for grabbing a great screen shot, and droplr for upload and sharing it.
It is impossible to deliver an "answer" to this question. You are asking for something that is purely opinion-based. I have friends who use super small fonts and it's very comfortable for them. I also have friends who use larger fonts, and that works best for them. I personally use a variety of font sizes depending on what Mac I am on and what App I'm using. Your best best is to work with whatever font size suits you, despite what anybody else tells you.
There is no "one-size-fits-all" answer to your question.
Best Answer
Automator
You can use OS X's Automator.app to quickly resize images to 1/4 of their original size. The Actions you want are:
You can create droplet like applications using Automator to make the whole process a single drag-and-drop. Alternatively you can set up a folder action to resize any image dropped into a folder.
To learn more about using Automator, see Apple's Mac Basics: Automator.