Kerning is the space between to letters. Never kern in, always find the largest negative space in a word, then kern outwards so that the rest of the letters fit.
How do you brake a sentence into two lines.
If I close my eyes and open them for a second, I find that I can see the word 'two' the most, this is most likely because it is in the middle of the page, so it draws the eye more.
Fitting words on a page.
Never use more than 10-12 words on one line! Maximum words!
Never use less than 6 words on one line! Minimum words!