Very simple input, but they have served me very well :-) 1: Make sure you have development and test environment available (including data transfer from prod -

Very simple input, but they have served me very well :-) 1: Make sure you have development and test environment available (including data transfer from prod -> test) 2: Source control and Easy deployment (to all environments) 3: Map the code into importance. (not all code is equal). 4: If possible spend time with the main user / product owner (especially in peak periods). You're blessed to have users, who understand your system. And rember code that has been live for 3 years have earned a lot of expirience PS: Typescript +1