Session singing can be some of the most fun you will ever have in a studio or backing established artists. When you are working in conjunction with a team of people who have to get the music for an advertisement ready by midday, the work that you have been putting in for years on your singing will suddenly start to mean something.
The dedication that you put into working on your voice and music can pay off if you are ever needed in a high-pressure recording scenario. Your voice may be used for a variety of purposes such as ads and jingles. The creative use of the voice can be an amazing thing; you just need to prepare the ground.
The more fluent you are in delivering harmony parts, adapting your sound, and being quick off the mark to take instruction from a producer, the more you will work.
You need a cool head and an even temperament in the studio. It takes time to build up a track. Yet again, you can re-invest this experience into your own material, as you get used to studio working conditions.