enwar3 - if you don't have them already,
Starting Strength and the
complementary DVD are two of the best resources for learning the main barbell exercises (squat, deadlift, power clean, bench press, OH press). Just about all of your questions and form errors are discussed very thoroughly in the book. A nice secondary (but free) resource is
Stronglifts, including their
squat tutorial and
deadlift tutorial.
Originally posted by: enwar3
I'm squatting in sneaker-ey shoes. They're pretty flat-soled. I don't have flatter soled shoes and the gym won't let me squat barefoot.
Weightlifting Shoes 101 has a decent discussion of why sneakers are not appropriate for weight training. The primary reasons are that they are not as stable as a hard soled shoe and that some of your power/energy is wasted in compressing a soft soled shoe. Moreover, for squatting, having a small (but incompressible/hard) heel in your shoes is actually beneficial, as it allows your ankles to attain a more advantageous position. I
highly recommend getting a pair of weightlifting shoes from a store like
muscledriverusa.com,
Rogue Fitness or
dynamic-eleiko. If those are out of your price range and barefoot lifting isn't allowed, a pair of Chuck Taylors is a decent alternative.
Originally posted by: enwar3
My feet are about a shoulder and a half apart.
It'll vary a bit for everyone depending on body shape, but in an athletic stance squat, the heels of your feet should end up roughly under your hips. However, since your feet should be turned out about 30 degrees, the tips of your feet will end up wider than your hips.
Originally posted by: enwar3
My knees end up about over my toes (or maybe a little more) but I keep my weight on my heels so there's not much more I can do about how far forward my knees go.
I'm not talking about how far forward your knees go, but rather how far apart the knees are. When you squat down, you should be consciously pushing your knees out (away from each other) so that, when seen from above, your knee and thigh are directly inline with the feet below them. This is essential for maintaining tension in your hamstrings and will be the key for getting proper hip drive. To practice pushing your knees out, due the squat stretch as shown in the
stronglifts squat tutorial. You should feel the stretch on your inner thighs, near the groin.
Originally posted by: enwar3
Going deeper causes me to have to shift my back (I can still maintain a good arch but it definitely does not stay solid and unmoving through the whole lift). I've been stretching my hamstrings in the meantime.
Pushing your knees out more will actually help you get better depth without sacrificing your lumbar arch. Stretching your hamstrings, glutes and lower back will help too.
Originally posted by: enwar3
I actually thought low hips would be better because that's a smaller angle that your back makes to the ground and therefore it's easier to maintain a solid back.
Proper deadlift technique usually has your back more parallel to the ground than people expect. As long as you start with your shoulders just in front of the bar, start & keep the bar in contact with your shins/thighs the entire lift (yes, it'll scrape a little, deal with it), and keep your chest up to maintain a neutral/flat back, your back will be quite safe and your lift a hell of a lot stronger.
Originally posted by: enwar3
I'll try what you detail in (5.) next time I'm at the gym.
Step 5 is certainly important, but if you don't set yourself up properly with steps 1-4, it won't help.
Originally posted by: enwar3
Does it look like I should do some supplementary exercises for my lower back?
Improving your form on the deadlift should be the first priority.