If you're asking about sci-fi in particular, it's pretty much like any other storytelling, in my mind, just with a futuristic slant. So continuity is still going to be a factor, and keeping things from getting anachronistic (unless, say, a rolex showing up in the story makes perfect sense), is probably a good thing.

I would say the biggest thing to avoid would be committing to any major plot twists or turns that you're not fully sold on because they're hard to retract or walk back if you're writing and publishing as you go. I've written a couple of novels, and it was actually kind of fun to write myself out of corners I put myself in, but depending on how things go, it could cause troubles with preceding chapters that have already been published if suddenly something else is introduced, or the background is changed, or something like that.

Otherwise, taking it slow, letting it breathe and settle as a story can't hurt. Committing to the story and making sure you're supporting your world building as much as you can is good. If you're not buying it, neither will your audience. People who read sci-fi are pretty used to suspending reality, so get daring if you want, but you still need to stay within the confines of the world you built. Stray from that and you will probably lose some folks.