The Maid class on Roblox is a useful class that I use to help manage state, especially in regards to signals or events. Be warned: This is a fairly technical article!
I use Maid extensively in Jailbreak. It vastly simplifies the cleaning up of events/objects, and gives me confidence that I will avoid memory leaks.
~ @badcc, developer of Jailbreak
Read it here:
You can download the Maid source code here:
Let me know if you have any questions about how to use maids, or what good patterns are in them!