1. Pack light.
While this is the easiest advice to offer, it's also (in my experience) the most difficult to adhere to. I like to have options throughout my trip, and the thought of being limited to only four sweaters is horrifying. I constantly must remind myself: what is necessary? What isn't? I usually try to leave room in my suitcase for a few "extras," just in case.
2. Pack smart.
You're under no obligation to "match" the locals in their style of dress, but you should certainly pack with an awareness of the cultural norms. Certain countries have strict modesty expectations; other countries are known for their neutral-colored garb. I'm spending the month in Oxford, England, so this tip was super relevant for my packing process. I primarily packed neutral-colored clothes, which served the dual purpose of blending in and creating easy-to-match outfits (can't go wrong with classics!).
Consider the bag(s) you're toting. Will a rolling bag be functional in a city with cobblestone streets? (I made this mistake, whoops!) If you're traveling for any length of time, you'll find yourself needing bags of various styles and sizes. I've found that a large suitcase and a backpack are sufficient for the "arrival" part of the trip. I was also careful to pack a clutch (for a quick dash out) as well as a gym bag (for weekend trips). Another item I've found incredibly handy is a foldable, reusable bag. Some destinations charge extra for disposable shopping bags, so save time and money by packing a reusable one in your purse.
3. Know what you can get on the other side.
Certain destinations will make this easier than others. Research can provide a general idea of what items local shops will offer. It's truly a personal decision – I decided to bring staple brands and products I prefer (like shampoo and deodorant) and elected to buy body wash and laundry detergent at a local shop. The key is to consider your preferences and always consider the weight of your luggage (too many liquids makes a bag super heavy!).
4. Also, know what you must bring with you.
Medicine is a great example: it's likely a local shop offers a Tylenol-like product, but you're always safer packing your prescription medication. During my stay in England, I'm taking university courses which require certain books. I opted to pack these books instead of searching for the particular editions once I'd arrived. Notebooks, on the other hand, are sold virtually everywhere so I chose to save space and buy mine later.
Another essential is method(s) of payment: Plan ahead for cash in the correct currency or a credit card. This past spring, I applied for my very first credit card (#adulting). Because I love to travel, the lack of international transaction fees is one of the reasons I chose my specific card. Many cards are beginning to offer this perk, but what's essential is to know your resources. Additionally, find out if you must contact your credit card company before traveling. I'm grown accustomed to calling and informing my company of my travel plans, but the new "chips" reinforce the cards with extra security, so my company doesn't require a heads-up! Be certain to sort this out before you depart, or risk a locked credit card!
5. Know your plans; plan ahead.
You know your trip itinerary best; use that knowledge to inform your packing. Consider the weather – my month in England is likely to be sprinkled with rainy days. So far, only dark clouds have interrupted the otherwise-sunny days, but I was careful to pack water-resistant boots, a rain jacket, and a small umbrella for my purse.
Also, consider travel – depending on the length of your stay, you may plan daily or weekend trips. Know what's available and what the locals use: trains? Buses? Ride-sharing? Keep an eye out for any resources that make this easy work, like maps and schedules. Even if you wait to purchase train passes, you'll want to be aware of your options (and their fees).
Ultimately, your packing should enable you to be prepared and have options while you travel.