Sometimes I feel lead or just know and it's so easy. I've been stumbling lately though, so I pray and study my Bible, seeking clarity and direction. I feel so lost in this new uncertainty, but I stay in prayer about it.
I know some people who say they hear a voice. Literally. I've possibly heard it twice. Once a long time ago, right before I sprained my ankle, and again a few years ago. Unfortunately, I ignored it, both times.
I felt the same way. I was going through some things and then He just saved me from having to be put in a position that would have messed me up badly. This was a few weeks ago, but I haven't forgotten about it and appreciate God for it because I know that He was the one who helped me. Nobody else.
It's actually very rare but, if you hear a voice and that voice speaks to guidance that is aligned and in tune with what's written in the Word, then know that it is the Spirit speaking to you.
The spirit will not tell you to kill, steal, make judgement or destroy! The spirit will tell you nothing that isn't in the Word.
You need to be very careful. I believe that the only way God "speaks" is thru His Word but unfortunately many people who call themselves Christian don't think that the bible is enough so they are always searching for these extra things which get them into trouble. And no even if those "voices" pointed me to the bible I would not listen. Don't forget that satan can disguise himself as an angel of light.
God only speaks with authority so if He speaks to you with an audible voice, you have to add it to the bible but as we know the bible is complete.