Putting my Google goggles back on, I can’t find a lot of tips and tricks, but I did come across the following resource. Chapter one of the book Thought Contagion addresses self-sent messages and mass belief. The chapter includes a section on recombining ideas, which offers some insight.
Otherwise, most of what I find has to do with mathematics, sentence structure, education, and other topics outside of innovation as a discrete practice. One resource from the legal trade is a stretch but introduces an interesting concept that might be useful: the ends/means synthesis. And this briefing note on conceptual synthesis might apply.
Can any FC Now readers recommend other resources?