Proper grammar and spelling is very important. To get ahead in any field, in today’s competitive world, your interpersonal skills are very important. Aside from proper writing, you need to keep up with your career of choice. Think of it as being a doctor. A doctor goes to school to study medicine, but his real studies begin once out of school.
You’ll need to be well rounded and certified. All Windows (3.0 to XP), LINUX / UNIX, Cisco, hardware and software, cables / connectors, walls, ceilings, crawl spaces, attics, etc.
In this field, you may not do it all yourself, but eventually you will need to know something about everything.
Especially, when you don’t want to be the grunt your entire career? What ever you do, do not stop learning about your career and what it is comprised of.
I hope this helps you. Good luck in all your future endeavors. Happy New Year!