WCAG 2.0 Compliance

So, a lot of the RFPs I've been bidding on are looking for WCAG 2.0 Compliance (accessibility for people with disabilities).

I figured the best thing to do is make my own site WCAG 2.0 Compliant.

I am striving for AA status on all 4 categories.

So far, here is what I am finding:

• Color Contrast.  This is big.  Like no light yellow buttons with white text.  Okay, that's atrocious for fully-abled people, but still, I've had to make a lot of changes along those lines. The biggest net effect is my site looks cleaner, crisper, more defined.  There were some beautiful aquas that had to go, since neither black nor white text provided enough contrast.  I also made my help blocks solid, instead of a faded out ghostly grey.  All of these are overall site aesthetic improvements. 
• alt attribute for img tags.  This is just good HTML practice.  I used to do that consistently as a high school kid building websites, I just got lazy.
• aria-label attributes for input tags.  This is new to me, never heard of that attribute before today. Looks like it's an assistive technology thing.