Editing, editing, editing. If you don't do it, you've been the victim of it. As a professional grows in their career, the chances of having to do it increase, since you'll often be looking over your employees' work. As an editor, I'm constantly looking over others' work, and the last thing I want to do is discourage them
One of the biggest misconceptions about editing is that it's all about typos and punctuation. It isn't. A good editor will make your writing not just more correct, but also clearer, easier to read, and easier to understand.
When possible, I try to let the writer have at it in between each read, although sometimes the process does get squished together (then reads one and two usually blend together). My editing process usually goes something like this.
Don't pick up the pen just yet (I have to remind myself of this every time). Read it through once just to get a feel for the piece. How is the organization? Is the tone consistent with the type of writing you're doing (formal writing, marketing speak, journalistic, etc.)? If a writer is coming at it from the wrong angle, they've got bigger problems than comma use. Pick up a pen afterward if you need to note any major changes (usually arrows or short notes).
How is the flow? Is the main point high enough up in the document? Can wordy areas be cut? Where is more explanation needed? During this second read, I also look for clarity and sentence structure. I prefer to make my comments using Word's track changes (rather than making direct edits in-line) because I want the writer to be able to do the changes instead of me touching the words at this point.
Typos, punctuations, word choices. This is where I get nitpicky. But if I don't have to edit something, I won't. Needless word changes or edits are just that: needless.
Sometimes you're only coming in at this last stage, and that's okay. Read with the pen (I do it often). But if you have a greater responsibility in shaping the work, I recommend taking a step back at first and honing it after all the pieces and tone are in place.
When you're being edited
One of the biggest things I try to convey to my writers is that my edits are not personal judgments on them or their writing. It's all about getting to that common goal of a well-written piece that conveys the message appropriately. I keep this in mind when I get my work edited as well (we all have an editor somewhere). Without it, I'd never grow as a writer. Yes, some of you will end up with editors that really do have an agenda (or pet peeve or other weird writing hangup), but just keep calm and learn to adjust a little for them if you can. Then find a writing project (like a journal or blog) to keep honing your own voice.
How do you edit others' work? How do you handle it when others edit your work?