Traveling by train is the easiest way so pack lite and bring only one suitcase that is easy to handle. If you plan on trekking up into the Tatras or visiting one of the many Spas, bring good walking shoes and warm clothes. Today the possibility of buying a language dictionary in your home country is better than at the time of my travels and I suggest you do so. If you, as I did, wait to buy the dictionary in Slovakia you might make the same mistake I did and buy one that will not be useful.When visiting the smaller villages, bring every thing you might need because there are no stores to buy supplies from. In the larger towns and big cities there should be no problem to replace necessary items.