They're mostly a waste of time anyway everyone just strokes their own egos and you spend 2 days digesting information in an archaic inefficient way
You're doing it wrong.
The reason to go to the conferences is NOT the lectures (which these days are all on videos anyway) but to spend AS MUCH time as possible talking to either the people working for the company who produces the technology the conference is about, or people working heavily with said technology. You learn a LOT more that way and make great contacts that are really useful in solving problems or finding new jobs.
Going to conferences is also something to mention on a resume in general, it shows a lot more dedication than most people to keeping technically sharp.