If you're steering from behind a wheel, pay attention to the wind on your neck... in fair weather avoid bundling up and having a tall collar. If you're conscious of the breeze under one ear you'll feel the apparent wind start to come aft.
Also with no spinnaker, generally the jib/genoa will start to misbehave, collapse and get your attention before the main will slam over.
Also be prepared to anticipate and correct any veering caused by wave action or approaching wakes.
And... don't sweat it - it's happened to us all.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"