Establish an accepted definition of cycle time. It is important that everyone in the company calls it by the same thing, or there will be confusion.
Identify a fairly stable process and establish Standard Work for it. That will require documenting the cycle time.
Identify parts of the process where the cycle time seems too long, where there is excessive variation, or where there are clear opportunities to improve.
Do daily improvement or schedule a project to make the improvements identified in step 3.
Go back to step 3 and repeat.
Note about timing your process: For the shop floor, use the Time Observation Sheet. In the office, use the Office Process Recording Sheet. You will likely learn a great deal about your operation simply by watching and timing. If your cycle times are significantly different from each other, you should start your improvement process by focusing on variation reduction.