Originally posted by J. Banér
If you think to get BB war when you have conquered Italy, I thinky you will lose this wars
I agree, as a minor I'd suggest taking out co-religionists only by dip-annex.
Then steal maps from spain, or trade them with revolter from spain, to take all pagans non-capital lands. You might even want to force-convert pagans and diplo-annex them.
Make sure to convert all these pagan lands with missionaries before proceeding to BB-wars.
When you stole maps from Spain you also force-vassalized them, and with the size you have you can diplo-annex them, which IMHO is a good (great) way to start BB-wars by.
Also make sure you are in alliance with three other major powers in europe, and have six diplomats saved, and at least
(year-1560)*10,000+500,000 men in your armies when you begin
This was my way, but there are many other, I guess

(The more the merrier though)