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From that limited information, it's a little difficult...so here is a bunch of things...hopefully something is close to what you need.
For your BBM contacts, if you were on BBM7, they are stored "in the cloud" with your BBID...simply sign into a different BB using the same BBID and your BBM contacts will be shown on that BB.
If you were on pre-BBM7, then your BBM contacts were stored locally on that device. Since it's broken, you'd need to have taken a backup of those prior to it breaking, so that you have a data source for restore.
If you mean your non-BBM contacts, then those as well depend on a backup or other data source from which you can restore them to another BB.
You can find many backup/restore instructions via the backup link in my auto-sig on this post.
Otherwise, please clarify exactly what you need and we may perhaps be able to better help you.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.