I have edited the string file (you can found file and instructions here) to add and modify all the menu shortcuts I want. So my windows menu is like this:

First, we have the normal window

When you be animating you won't need the style window too much, so you can undock with Control+] it and drag it to the right most you can (look at the screenshot, at right you can see a little part of the style window). All the vertical space now will be for layer window. If you want it back, just dock it again Control+]. You can dock and undock all the time.

If you are drawing, you don't need the timeline, so you can undock it Control+[and drag it to the right. When you be animating, Just dock it again Control+[.

Maybe you know most useful tool shortcuts and don't need much the tools window when drawing or animating. The same, just undock it (Control+T in my case), drag it to right and dock again when you want Control+T.

Ok, finally, maybe you want all the workspace for drawing. Undock all windows (Control+L to dock/undock the layers panel in my case). It's great when you have to draw on a single layer.

So, as a resume, you just need to drag to the right the undocked windows one time. Once you have all the undocked windows positioned in right you just play with the shortcuts
PD: Drag to the right the windows is similar to close it, but not the same. Actually, if you close a window, this tip doesn't work the same: instead having the shortcut working as dock/undock it works as open undocked/dock/undock in the last place/dock...