New to hitchhiking or do you want some random information? There are many guides around. Hitchwiki is by far the most complete as it is edited by many hitchhikers around the world.

Check for example:

For more information about hitchhiking to the Ukraine, go to the Ukraine page. And for people hitchhing to Odessa from the South, you can find more information about hitchhiking through Moldavia in this discussion.