A guy in my writing group went through my manuscript and highlighted every place where I had joined two independent clauses with and. Apparently I use this construction all the darn time, enough so that it really popped out at him. I'm trying to branch out and not use the and so much, but I find it hard to avoid. What are some other ways to handle this? Here's a wee example from something I'm working now (whole paragraph included for context, problem sentences underlined):
I’ve got a flat-topped chest that I keep some gear in, across from my bunk in the stern. I pull a blanket off my bunk and fold it up on top of the chest. After a minute, I add my pillow. When I go above again, the girl is half-way to the open hatch, unwilling, apparently, to let go of her last handhold and step across to it. I reach out a hand to help her, and she takes it without a word. She settles down in the little bed, and turns her face to the wall. I go back up.