Luggage and bags:
City backpack or small bag but, as usual in European cities, in crowded places in downtown cash and cards should be placed close to your body to avoid smart pickpockets.
Clothing/Shoes/Weather Gear: Dress for the season and keep an umbrella handy. It can rain at any point in the year. Warning: sometimes there are very hot days in summer and very cold in winter. Wear good comfy walking shoes if you are going to walk a lot.
Read info on average temperature and rainfall in Warsaw.
Check weather: 10-day forecast for Warsaw
Toiletries and Medical Supplies: In my train (EuroCity) to Warsaw there was no water and no paper in toilet/restroom... it happened to me the first time - maybe the last one but... you are warned.
Photo Equipment: Wide zoom is useful for taking pictures of architecture.
Miscellaneous: I'd recommend to bring SIM-unlocked mobile phone to call taxi (it's cheaper and more comfortable then to look for them) and to book a table in the busiest restaurants/pubs. The cheapest card for a mobile phone cost a few euros.
The wettest months in Warsaw are from May to August, but it can rain anytime, so it's a good idea to be prepared. From late November to early April, it can be quite cold, so bring appropriate clothing.
Photo Equipment: You'll want you camera gear to capture the parks, architecture and the people of Warsaw.
Luggage and bags:
....read the ones that are recent! Poland has changed a lot since 1989 when we became an independent nation again and is nothing like the Poland from the past anymore!!! I`ve had some funny stories with people coming to Poland after reading some old old guide books and being prepared like for going to a survival camp!
My high school was an international school and we had a lot of exchanges with other countries there. This one time a quite big group of teenagers from Scotland came and in their applications they all indicated that they were vegetarians. We were really surprised and didn`t quite know why all 30 of them ate just veggies, and it turned out that all of them read a guide book about Poland written nobody-knows-how-many-centuries-ago and found out we just love horse meat here!!! They were really surprised not to see any dead horses on any place anywhere and soon admitted they would like some of the meat their host families ate instead of just a salad lol! (look below for more)
Clothing/Shoes/Weather Gear: And let me tell you, not only I have never eaten horse meat, I haven`t even seen it!
There is another story, one of my host moms in the US read a book about approprieate behaviour in different countries and asked me if it was true that when you pay somebody a visit in Poland you bring them cigaretts or toilet paper, because those are hard to get and appreciated!
Many of the guide books were written centuries ago or much before 1989, so most of it is just really silly and have never been true or is not true anymore! Also, even in the newest books you can always find some ***- like the book my host mom read was issued in 2002! So remember, don`t believe everything you read and check it out by yourself! And if you ever meet up with my don`t bring me toilet paper, cause it will NOT be appreciated lol!!!! ;)
Toiletries and Medical Supplies: Everything is really easy to get. For the cheapest stuff go to one of the big supermarkets, but if you don` care about the price (there`s a little difference, but not like a huge one) you can get everything in one of the street kiosks!
Photo Equipment: It`s a must-have in such a pretty city!!!! If you forgot yours it`s really easy to get.
Camping/Beach/Outdoor Gear: Warm clothes for the winter are a must-have! Bring a warm jacket, a hat and gloves with you, if you don`t own then they are easy to get in this freezing land!
Summers are hot!!!! Polish people wear sandals or flip flops, shorts, short-sleeved shirts.....Guys will think they had died and come to heaven- Polish girls don`t wear that much on in the summer! ;)
Miscellaneous: Take a bag of some sort for shopping when visiting Poland! Wherever I went they did not have grocery/shopping bags available and I'd wished I had a self folding nylon bag. I do not travel without one now wherever I go in Europe! Try www.magellans.com for a sturdy nylon bag with zipper.