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I like the use of sound in the trailer for the drama 'Suffragette' https://www.youtube.com/watch?v=056FI2Pq9RY

This is because it uses loud but brief sound effects to climax a moment of action or key significance to the film and end with the 'cut to black' editing convention. These occur at the start of the trailer to act as 'mini-climaxes' which helps set a serious and consistent tone throughout but also brings about cohesiveness by combining well with the final climax at the end of the trailer.

I could also use sound effects in a similar manner to try and separate the stages of my trailer by creating 'mini climaxes'. For example i could build up to a mini-climax through fast paced editing and then use an intense sound effect when the protagonist sees his dead granddad, to signify the importance and the drama of the moment in the film