I get to try a LOT of applications and utilities, but few of them remain installed on my Macs for the long haul. This is especially true of small shareware utilities that tend to solve a relatively minor issue that few people even consider a problem to begin with.
When I tried Yoink, from Eternal Storms Software, I suspected this might be yet another one of those apps that was more trouble than the problem it attempted to solve. After using it for a short while, I was happy to find this was not the case at all.
When Lion shipped with the Full Screen feature, I found it to be cumbersome to use all the time because it limited drag & drop access between the Finder and apps that were in Full Screen mode. The problem for me was, I was really starting to enjoy using Full Screen with as many apps that would support it. Yoink solves the single, very annoying problem.
Yoink places a small window on your screen as soon as you start dragging a file which you can then drop the file on to store it. You can drag multiple files to the window if you wish. Then when you’re ready to drop the files into another program, you simply drag them out of the window. Normally, Yoink’s window lives on the screen edge, but you can configure it to appear just next to your mouse cursor when you start dragging a file.
I find Yoink particularly useful when I want to attach several files located in multiple locations in the Finder into Mail when it’s in Full Screen mode.
You can view a brief video of Yoink in action, then purchase Yoink here for only $2.99. If you’re unsure if Yoink will work for you, there is a 15-day trial available.
When Apple releases Mountain Lion (OS X 10.8) next month, we’ll be treated to hundreds of new features. But one of the most exciting for me is the ability to take advantage of 
When Apple announced the Full Screen feature in Lion I was quite skeptical of it. I really didn’t see the value of it from what I read. Of course, once Lion shipped and I gave Full Screen a try, I love it. It’s not just that it provides a distraction-free workspace, but when I use gestures to swipe between apps, I just feel more productive; much more so than using the application switcher, Mission Control or switching apps with the Dock icons.