How do you deal with tattle tail like co-workers??

I have been working at a law-firm for about 1 year now and some of my co-workers love to run to the boss every time i do something they don't approve of. It's getting ridiculous. Honestly, they do things that i don't like and don't approve of such as take hour long personal calls and pass things off on other co-workers. If they don't have to do it they won't. But i am not the type of person to go running off to the boss and get someone in trouble. That causes animosity that people don't want to deal with on a daily basis.

I had to distribute about 20-30 books yesterday. Now the secretaries have the old versions that need to be recycled at their desks. A co-worker of mine came to me and said, " (boss), wants you to go pick up those books."

I work with 3 men that could have easily picked them up before i got there. I asked him why I was the one that had to go get them all and all he said was i don't know. We could have gotten them together and i wouldn't have cared.

See he's the type of person who will throw everyone under the bus to cover his own butt. So he went to my boss and told her i had an attitude problem. Which in turn she called me into her office to talk about it. She told me that she said if he was busy to tell me to do it. He wasn't busy at all. He was sitting there doing nothing and continued to do afterward. And she asked me if my other co-workers get an attitude when i ask them to do things... no because i ask them.. i don't just tell them that they have to do it with no other explanation.

Regardless i was the one who got in trouble again.. maybe i should just start tattling back and tell her all of the things other people do that i don't like. Or should i just suck it up because i'm leaving fairly soon. Trying to make it sooner. What would you do?