Does anyone have any reliable info on bid'ah in Islam? What is defined as 'good' bid'ah and what is bad?

I know generally any bid'ah in worship is not allowed but what about other things?

for eg people say that stuff like boycotting and marches are bid'ah as the prophet (saw) never did them...yet the prophet (saw) did not support the non muslims against muslims and knowing that certain companies or whatever support actions against Muslims its only common sense to boycott not to buy from them (supporting them with your money)..

Also the companions collected the Quran into one book in the time of Abu Bakr (ra) even though the prophet (saw) did not do this (as he and Zaid bin thaabit initially pointed out)...

if anyone could shed light on this inshaAllah in terms of exactly what is defined as bad bid'ah and what not..