There is no better feeling than leaving work behind and going on holiday, whether it's to the sea, the city, the mountains or another part of the world.If you're sightseeing or taking part in a lot of activities, your trip may be quite tiring -- not relaxing.According to a new survey by OnePoll, about 20% of US travelers are always thinking about planning their next trip while they are on vacation.But do you ever feel that one holiday just isn't enough -- that being on holiday gives you the taste to travel more?But for others, perhaps the holiday didn't give them the rest they wanted or needed.If that's you, you're not alone.And 27% of people can't wait to be on vacation again within a week of getting home from their break.For some people, that might just be because they remembered how good it can feel to be on holiday.People often say that when they get back from a holiday they need another holiday to recover!