Warning: Time travel can be hazardous to your sanity. Proceed with caution.
Step 1: Choose your time period wisely. Ancient Egypt? Check. The Wild West? Double-check. The Disco Era? Triple-check.
Step 2: Pack accordingly. Leave your wallet in the future, your sense of fashion in the present, and your dignity in the past.
Step 3: Be prepared to meet your past self. Or, you know, your past self's past self. Or their past self's past self. It's like Inception, but with more togas.
Paradoxes and Contradictions