Some useful words and phrases:

The most important words:

yes = igen
no/not = nem
Good morning! = Jó reggelt (kívánok)!
Good day! = Jó napot (kívánok)!
Good evening! = Jó estát (kívánok)!
Good night! = Jó éjszakát!
Good bye! = Viszlát!/Viszontlátásra!
Hi! (for one man) = Szia!
Hi! (for peoples) = Sziasztok!
I understand = értem
I don`t understand = nem értem
please = kérek/kérem
Thanks! = Kösz/köszi!
Thank you! = Köszönöm!
Thank you very much! = Köszönöm szépen!
Don`t mention it!/My pleasure (as a reply for "Thank you") = Szívesen.
Excuse me! = Elnézést (kérek)!
I`m sorry! / I beg your pardon! = Bocsánat / Bocsánatot kérek!
help = segítség
where? = hol?
which way/in which direction? = merre?
when? = mikor?
how? = hogyan?
now = most
later = késobb
urgent = sürgos
day = nap
week = hét [derived from "seven" (days)]
month = hónap
morning (early) = reggel
morning (before noon) = délelott
afternoon = délután
evening = este
night = éjszaka
today = ma
tomorrow = holnap
the day after tomorrow = holnapután
yesterday = tegnap
the day before yesterday = tegnapelott
to eat = enni
to drink = inni
to sleep = aludni
square = tér
street = utca
road = út
museum = múzeum
post office = posta
travel office = utazási iroda
right/to right = jobb/jobbra
left/to left = bal/balra
straight = egyenesen
in front of = szemben
and = és