Things to do in Slovakia
Train is by far the best option to travel across Slovakia, provided you don't have a private vehicle. Rail network is extensive, the only exception is central southern Slovakia, where buses are more efficient. Trains are fairly priced, reliable and clean. Opt for an InterCity service if you want Western-style comfort; IC trains link Bratislava, Zilina, The High Tatras and Kosice. These can save you from the crowds: ordinary trains do get crowded, usually on Fridays and Sundays. Watch out for pickpockets at major stations and steer clear of money scams. Also, sporadic robberies occur to sleeping passengers travelling the overnight longliners.
Hitchhiking in Slovakia is best done by asking around at gas stations. It used to be that most people only speak Slovak (and possibly understand other Slavic languages) so it was difficult for foreigners who don't speak Slavic languages. However, nowadays most of the young people speak English and almost as many speak German.
Keep in mind that trains and buses in Slovakia are cheap for Westerners, and (apart from extremely rural areas) it might take a while for someone to pick you up. You can find some offers if you travel from Slovakia and into Slovakia as well on specialized web pages. The biggest hitchhikers page in Slovakia is stopar.sk. There you can find offers in English, German, French, Polish, Czech and Hungarian language and it is free.
If one intends to drive on the motorways it is required to pay a road toll. This is done by buying a sticker ( vignette ) which is valid for a week (4,90 ˆ) or longer. The sticker is fastened in the upper right corner on the car's windshield. Getting caught driving on the motorway without a valid vignette means that one has to pay a fine.