This is going to be a post about some eclipse / fdt settings I figured out to be really helpful developing with fdt. You might find some more on the fdt blog

let me start with this one:

Refreshing Workspace when compiling an swc:
If you are not using the standalone version of fdt you will be missing one setting thats really helpfull using linked swc’s : the benefit of refreshing your fdt project the moment you recompile your swc file. By the Way: the standalone version being build on an old version of eclipse doesn’t really make scence to install.

activate the settings shown in the picture and your project will automatically refresh when you change something in your swc file:
Refresh Workspace