Method to develop a key change?

Question

I know this question may seem broad, but I am a very mathematical person, I've never had much "ear" for these things. I have a slow tempo song, about 90bpm with a VI - I - IV chord progression for a chorus, however when heading into my bridge I am adding a V onto the end for transition into another key, I can hear it in my head so clearly, but nothing I play can satisfy me. Is there a technical solution to knowing which key to jump into next? And also, for knowing where in that key to start? For reference the key is E. And I really like the V for moving keys, I would like to keep it I just don't know where to go from there.

Answer 1

Secondary dominants are great for this. Trey using the V of the key you want to resolve to as a pivot chord.

Example Key of E : E...... C# E A GMajor CMajor

I VI I IV V/bVI

Key Change C : V I