Although you will find a lot in Virtual Tourist site , i recommend that you will take a good guide book in your language and a good map.
A map you can find in almost any hotel you stay or a tourist information stand.
In a guide book you will sometime find small anecdotes about a place or a tip about hidden attraction that you will not find in the internet.
Another thing i am doing in my trips - writing the tips i found on the internet (and VT) in a notebook and check it too.
Luggage and bags:
You can buy everything you need in Hungary (for a good price too!).
I wouldn't recommend walking around with a big heavy rucksack as it can be awkard, especially on public transport.
Weather-wise we went in March, which was fairly warm and it didn't rain once. Try to pack layers rather than bulky clothes - I took a few jumpers with me and they didn't make it out of my rucksack for the whole three weeks!
In the summer months I can imagine Budapest becoming very stuffy and hot .
Make sure you pack a swimming costume for all those thermal spas and a corkscrew to open your bottle of Bulls blood!
Miscellaneous: The water in this country is weird!! You can only seem to buy sparking water everywhere and even that tasted weird. One day I stumbled across a supermarket called, "Match" and found Volvic mineral water. It was like finding gold!!
Luggage and bags:
Extra bag (soft) to expand capacity after buying lots of souvenirs, books and posters. You go with one bag with the soft one inside and come back with two!
Clothing/Shoes/Weather Gear: Rain coat, umbrella, plastic hat...whatever you want to protect from rain if it happens.
Photo Equipment: Lots!
Miscellaneous: Good walking shoes...
Luggage and bags:
Any bag is suitable, but take some kind of small backpack or bag to carry necessary items like water bottle and sunscreen, because in the summer average daytime temperature can be up to 35 degrees.
Clothing/Shoes/Weather Gear: For the summer light clothing and sum kind of sport shoes or sandles are best for that time of year.
Toiletries and Medical Supplies: Anti-perspirant, insect repellant, anti-histamine, sunscreen
Photo Equipment: Normal photographic equipment will be OK. Most hotels and shops will carry the standard batteries and films for cameras. For video equipment (i.e. recharging the batteries) the plug/socket is the standard european two pin. So it you are from Britain/Ireland or the US/Canada bring an adapter.
Toiletries and Medical Supplies:
just a few trains are quite clean. above all the toilet ..so go in advance if you are a girl cos it not more comfortable have to go one get in and take wih u a roll paper because there often isnt
Photo Equipment: So useful will be a tripod for night shots above all at Buda hill
This city is very beautiful - so many places to see , so many things to do.
A lot of monuments , statues , buildings , good food , green parks , The danube.
Take a lot of film or digital media if you are using digital camera.
If you are using Digital SLR to to take a good lens that will cover a good range - something like 28-135 or 18-200 will be very good to capture a lot.
For Digital camera (not SLR) - an optical zoom X6 to X15 will be very good option.
If you are planning some night shots take a tripod with you - it will make your pictures better.
Here it is my guide book that provided me details about a geographic location, tourist attractions, or most interesting itineraries in Hungary.
Hungary. Polyglott Verlag GmbH, Munchen, 1999, 96 pages.
If you are planning to walk a lot around the city you must take good and comfortable walking shoes.
The distances here are big and you might find yourself walking a lot from sight to sight even if you will use public transportation like the metro or tram.
For example - on the first day i walked from the hotel on Kelvin square to the Jewish synagogue and from there around the Jewish quarter and to heroes square from Andrassy street - something like 10 km.
If you are visiting Budapest in the winter you MUST bring warm clothes and an umbrella !!!
But in the summer also bring a scarf or a small jacket for the evening near the Danube and a small umbrella with you just in case it will rain - we had 2 rainy days on our trip although it was July and very hot.