My main problem is I tend to get stuck in a blast away every enemy as you see them mentality when it comes to these kinds of games, and that pretty much gets you killed in this one. Taking your time and carefully picking off you enemies 1 by 1 definitely works best in this one.
This is my problem as well. I'm not a huge gamer, so I'm not big on "strategy." I see bad guys, and I just want to shoot all of them right away.
Stealth? What stealth?