Keep Snacks Handy When You are Out – This was my snack stash for Disney World. I had Macadamia Nuts, Walnuts, Pecans, and low carb bars. I made sure to chill the water bottles in the freezer beforehand so that as they thawed throughout the day, we had cold water. When hunger hit, instead of falling to temptation, I just grabbed my bag of snacks before I got HANGRY. Doing so made it so much easier to make keto/low carb choices at mealtime. I kept my snacks simple because we already had enough to bring with us (if you have a baby and a toddler you know what I mean). I saw lots of people with small coolers who were snacking on fresh veggies and deli meats, but, again, my goal was easy breezy. You can find a great list of Keto/Low Carb Snack ideas here for inspiration if you prefer a variety.
In colder weather it’s probably better to focus on the great cities rather than places more known for scenery and outdoor activities. If your budget is generous then my top choice would be London, Paris, and Amsterdam. You could fly into any of those and then visit the others by high-speed train. The train that connects London to Paris and Amsterdam is called the Eurostar, and the earlier you buy your tickets the cheaper they will be. Paris and Amsterdam are linked by normal high-speed trains, which are also cheapest when you buy early. Speaking of that, your dates are prime travel dates over the Christmas holidays so the airfares will be kind of expensive and they will only go up from here. In other words, buy as soon as you can.
If you crave warmth but think the beach bores you, head to the Southwestern United States. New Age meets Old West in Santa Fe, Phoenix is still toasty and its cultural season is in full swing, and Denver makes for a great trip. And if you've never seen the Grand Canyon, winter is a good time to visit since the crowds have thinned out (but do dress warmly).
As a male who usually travels solo, I’m not sure I’m the best source of advice for solo female tips. There are hundreds of travel blogs run by solo female travelers, and if you Google some specific topics that you are curious about, I’m sure you’ll find some great information. Generally speaking, the females tend to say that traveling solo is far easier and less threatening than they had feared.
Australia’s capital has been voted the world’s most livable city—for the seven years in a row. If that isn’t reason enough to go, what is? Here's another: the artsy cosmopolitan city promises pleasant temperatures in the high 60s throughout November. Book a room at one of the area's buzziest spots, QT Melbourne, a design-centric boutique in the city’s fashion district.
Unlike Bangkok, which has warm evenings and blazing hot days pretty much all year, Chiang Mai cools off nicely during December, at least in th evenings. This is an outdoor city with an emphasis on hiking and exploring temples so the cooler temperatures will be welcome for most people. It's still hot most days, and quite dry as well, so it balances nicely.
Another option would be Cambodia and/or Vietnam. The town of Siem Reap, which is just next to the Angkor Wat Temples is the real highlight. Phnom Penh is worth a quick look, but not on a shorter trip. Vietnam itself is a wonderful and gorgeous country, and you can see a lot of the highlights in 10 days or so. It’s also very cheap, even around Christmas. You could fly into Hanoi and then go see Ha Long Bay, and then take a train down to Hoi An. After that you could go to Nha Trang for the best beach experience or the hilltown of Sapa. The city of Ho Chi Minh City is quite crowded and you might not like it for more than a day or two.
If you’re a bit more on the timid side, you can always use Yelp and TripAdvisor to get good insights on places people have visited. As a disclaimer, some of the ratings may not be accurate on these sites, so make sure you go through and read some of the more recent reviews that people have written. We did this for a few of the places we visited and had no issues.