We all feel the need.
Whatever your pace now, more is better. Speed creates new problems for the batsman. It's your job to create problems for that guy.
The problem is that everyone has different needs, and not all fast bowling tips work for all fast bowlers. You have to experiment with some things to see what works for you. The good news is that the feedback is instant: You either got quicker, or you didn't.
So try these ways proven ways to bowl faster and let me know how you got on: