Strategically place reverse reverbs in your track whenever you need an energy boost. This could be before a main melody, bassline, or impact. Feel free to try out this method with non-vocal samples too.
Create a new instrument
One of the best feelings as a music producer is creating a sound you have never heard before. Treating your vocal sample as an instrument is one way to make this happen.
This method is the most fun when you do away with conventional vocal processing and explore parameter extremes. All the imperfections and unique tonal characteristics of the vocal sample will rise to the surface, and you’ll get a whole new perspective on the sound you’re working with.
Find a moment in your vocal sample that stands out and drag it into a DAW sampler. If you experience any pops or clicks, zoom into the waveform and adjust the start and end of the vocal so it sits on the zero point. Alternatively, you can add a short fade on either side.
Sustained notes that are also vowels will produce more ambient instruments, but feel free to experiment.
Here is a basic descending melody: