I think I'm pretty lucky in terms of learning about the web right now especially coding.
Accessibility is getting very important and will become even more crucial in the future. In terms of coding, that means not coding in out of date methods or pratices that are soon to die out.
Some of these older methods include:
Using tables to layout a web page. Luckily when I was learning, I didn't learn to code using this method but went straight on learning about divs. I've read articles (recent ones!) about people still using tables.....why!
Depreciation tags. Old tags used for styling and whatnot. I remember learning about CSS and trying to get my head around the concept of having a separate file for styling.
Obtrusive Javascript in html. Also very lucky not to learn it this way. Though I've only started using Javascript recently....well, jQuery (ease of use). Been reading on how some Javascript methods used for interactivity can really be obtrusive to the page creates bad accessibility. JQuery really makes things so much more simpler and (definately can be) non-obtrusive.
Up and coming HTML5 and CSS3. Not part of the old method. Now being used more commonly in web coding though not fully supported, pushing the boundaries of what can be done. Making less dependant on plug-ins and Javascript. It can only be a good thing!....I've yet to try it out!
