As an editor, your tools are everything. Having the right hardware and software can mean the difference between a smooth workflow and a frustrating slog through technical problems. After 25+ years in this business, I've learned a thing or two about what works and what doesn't.
The Computer: This is your most important tool. Don't cheap out. You want a fast CPU, plenty of RAM (32GB minimum for 4K work), and a dedicated graphics card. I prefer building my own systems because I can control every component and upgrade as needed. But if you're not comfortable building, there are some great pre-built options from companies like Puget Systems.
Storage: You need fast storage for your media and even faster storage for your scratch disks. I recommend a setup with multiple drives: an SSD for your OS and applications, a fast SSD for your current projects, and larger traditional drives for long-term storage. Never work directly off a single drive - always have backups.
Monitors: Get the best monitor you can afford. Color accuracy matters, even if you're not doing final color correction. I recommend at least a 27" 4K monitor, calibrated properly. If you can afford dual monitors, even better - one for your timeline and one for your viewer.
Audio: Don't forget about audio monitoring. A good set of studio monitors and quality headphones are essential. Your built-in computer speakers won't cut it for professional work.
Backup Strategy: This cannot be overstated - you MUST have a solid backup strategy. I use a 3-2-1 approach: 3 copies of important data, on 2 different types of media, with 1 copy offsite. It might seem like overkill until you lose a project to drive failure.
Software: Obviously you need editing software, but don't forget about the utilities. Drive monitoring software, backup software, codec packs, and maintenance utilities are all part of a professional setup.
Remember, these tools are investments in your business. Buy once, cry once - get quality gear that will last and pay for itself over time. Your future self will thank you.