If you think something could cause problems for you, then do something that will instigate those problems. A: "That dog looks like it could be mean. We should go scare it off." B: "No way, leave it alone! Don't trouble trouble till trouble troubles you!" A: "I accidentally scratched his car pulling out of the parking lot last night. Should I offer to pay for it?" B: "No, he might not even notice. Even if he does, he wouldn't know who did it. Don't trouble trouble till trouble troubles you."