Time Traveler's Guide to Not Messing Up the Timeline

So, you've managed to mess with the space-time continuum, and now you're here to learn how not to mess it up even more.

Local customs in the 21^st century include:

• Tipping your barista with a small, non-anachronistic gift

• Respect the no-photography rule in museums

• Don't eat the free food samples without asking

• Tip of the day: Don't wear pleated pants