Tip n°2: how to make sure you tested everything
When you’re testing your developments (or when end users are testing them on a quality system), if you ever wanted to know which portions of your code were actually being used, this tool is made for you: SCOV. To sum it up it’s a transaction that will give you the exact percentage of ABAP code that has been executed during a period of time. For example the following screen shot is showing that 80% of the code from class ZCL_TRDA_SEQUENCER has been tested:
And you can also display the corresponding pieces of coding with different colors depending on whether they were executed or not: How cool is that?