I occasionally get e-mail where there are several separate actions. What I do it clip each individual action using a hot key sequence directly to my GTD list system. I'm using a Mac and Omnifocus and I can clip pieces or entire messages to the OF inbox. There I can process them to their on-going projects.

An example I have an area of focus for sheep association and within that is a project to process requests. A recent e-mail I got had several actions 1 was a death report. I clipped the sheep death data as one inbox item. Another was an update to a phone number I clipped that update out separately and the final one was a request for information. That too became a separate clipping. Then in Omnifocus I can quickly run through the inbox and assign both project and context to the actions. The sheep death was assigned to update registry SW context @computer windows. The phone number was assigned to update web site context @computer internet and the request for info was assigned to process requests context @inside by myself.

Not sure of your system but can you set up a hot key sequence to either append the clipping to a text file or clip to a task management system that allows you to set the context and data of a group of things at once?

I haven't explored clipping and appending the data to a file but I know on the Mac I can use Apple Script to do that if I choose to.

The goal would be to make it a simple keyboard command to capture the bits of data you really need into one location and then process those updates all at once.