Don't have time to do a language course before your next trip? Learn phrases and correct pronunciation from locals with the help of your iphone on location. Ask people you meet in your travels (shopkeepers, chambermaids, waitstaff, taxi drivers, everyone who you encounter) how to say phrases you want to learn in their language and record it on your iphone or other smartphone. Then practice when you get back to your room and record yourself and compare to the native speaker you recorded previously. This is a great way not only to learn useful phrases, but to interact with locals!
If you are not traveling with your smartphone a pen and notebook will suffice!