Don't use any shortners that have a "report as spam" function. Meaning don't use any of them. Even if you don't spam, there are competitors who just don't like you and report it just cause they are douche bags.
I found one that is useful but the problem is that it takes you to a empty site first where you have to press "continue." At the same time, there is a "download" button at the bottom and if you hit it, it takes you to a site about download managers or whatever.
Some people might accidentally hit it.
its called lix.in
However, I highly recommend domain forwarding. Buy a .info domain for whatever cents and set it so that your .info domains directs to where ever you want.
One more thing about shortners, if you shorten the same link more then once, they give you the same url so if you only used it for 1 or 2 sites or something, it can hurt when they disable it.