Use Source Control
For anyone who was a developer in their past life, or is one now, this is a no-brainer, no-alternative best practice. In my case, because I come from a management and systems background, I’ve had to learn this the hardway. If this is your first foray into development, get ready, because you’re in for some mistakes, and you’re going to delete or change some code you really wish you didn’t. Whether it be for reference purposes on something you want to change, or something you do by accident, you’re going to need that code you just got rid of yesterday, and we both know you didn’t back up your Visual Studio jobs… Hence, source control. Github and Microsoftoffer great solutions for Visual Studio, and Redgate offers a great solution for SSMS. I highly recommend checking them out and using the tools! There are some other options out there that are free, or will save your code to local storage locations, but the cloud is there for a reason, and many of us are on the go, so having it available from all locations is very helpful.
Regarding source control for Integration Services packages, that’s a good reason to learn Biml—it works much better for source control than the native packages (which change every time you open the package and contain a lot of noise).