Alternative to multitouch in Mavericks I am using OSX Mavericks on latest Mackbook Pro Retina.
After a week of intensive usage I have got some pain in my fingers because of the multi-fingers scrolling (two to scroll pages, three to switch between screens).

How can I scroll in applications without using 2 fingers-scroll? I know I can press 'Fn+Up/Down' in web-browsers, but how to scroll in Finder, Terminal, etc.? 
Is there also any way to switch between virtual screens without using three-fingers?

PS: when scrolling using multi-touch, one has to keep 2 fingers floating over the surface of the trackpad - this after some time leads to the pain. On iPad it doesn't happen because its position is usually not vertical (when you keep it in another hand).
You can switch between screens using the Ctrl+Right/Left Arrow shortcuts (by default, this can be of course modified in the Keyboard Shortcuts settings).

You can scroll in the terminal using Shift+PgUp/PgDn keys. On MacBooks you will need to press Shift+Fn+Up/Down Arrow.

Fn+Up/Down also works in Finder.