1. A laptop
You got to be ready in case you get that call to fly out of town, and you need to do some last minute edits on the plane.
2. A portable midi controller
You never know when you may get inspired to make a new beat. Pull it out of you bag, and bang it out!
3. A nice pair of audio monitors
You don’t want that final mix sounding like a fat turd. You need some good monitors to get it right.
4. A flash drive
No one burns data to CDs anymore. Transfer those files the quick and easy way,
5. A decent pair of headphones
When you got to make those final tweaks and you’re in a place where you can’t cut up the volume, a nice pair of headphones can really come in handy.
6. A Dropbox account
This cloud storing service is a lifesaver when you need to send big files over the internet
Source: Indie Hip Hop