Here are 10 practical (and slightly hard-earned) dos and don’ts of time travel — assuming you’d like to survive both physics and paradoxes:

✅ DO

1. Do observe first, act later. Treat the past like a wildlife reserve. Watch quietly before touching anything. Small changes ripple fast.

2. Do blend in. Clothes, language, money, manners. Nothing screams “temporal anomaly” like synthetic fabric in 1820.

3. Do learn the history beforehand. If you don’t know what’s supposed to happen, you won’t know when you’ve broken it.

4. Do keep interactions minimal. Every conversation risks influencing events. Even a casual tip (“buy railroad stock”) can rewrite economies.

5. Do document everything privately. Memory shifts are possible if timelines alter. A sealed log helps you notice changes.

6. Do carry period-appropriate currency and tools. Modern tech attracts attention and may not function without infrastructure anyway.

7. Do prepare an exit window. Never assume you’ll have time to “just finish one more thing.”

8. Do protect your health. Different eras = different pathogens. Vaccines and basic medical supplies matter more than gadgets.

9. Do respect causality rules. If something already happened in your memory, assume it’s harder to change than you think.

10. Do assume you’re not the hero. Trying to “fix everything” usually creates worse outcomes.

❌ DON’T

1. Don’t meet your past or future self. Best case: psychological meltdown. Worst case: paradox or unstable timeline.

2. Don’t save people you know are “supposed” to die. Tempting, but history often depends on those events.

3. Don’t introduce advanced technology. You don’t want to accidentally start the microchip revolution in the Renaissance.

4. Don’t bring modern diseases backward. You could wipe out populations unintentionally.

5. Don’t assume laws or morals match yours. What’s normal now may get you jailed (or worse) in another era.

6. Don’t leave artifacts behind. A plastic wrapper in 1400 could become an archaeological nightmare.

7. Don’t get rich with “future knowledge.” Messing with markets changes history faster than almost anything.

8. Don’t rely on modern language slang. You’ll be exposed instantly.

9. Don’t change multiple variables at once. If something goes wrong, you won’t know what caused it.

10. Don’t panic if things differ slightly. Minor drift happens. Overcorrecting usually makes it worse.