The best weight lifting site I've come across. He's a bit nazi with nutrition, but since he's 50 he needs to be. Still lots of good stuff and videos of exercises.
One very important thing is the focus on correct form for doing things. Better to use lower weight with correct form than using too much and getting injured. Most people new to weight lifting get too focused on the numbers and take shortcuts leading to injuries. Focus on the feeling and pump in your muscles instead, and lower the weight until you can use proper form. This can mean A LOT lower than you used to do, but will be safer gains. Can't workout if you fuck up your joints.