First up is a collaborative Google Sheet where ISTE participants have been putting links to presentations and resources that they have found during ISTE. Once you finish going through that in a month or so, look at these tweet:
Since I'm #NotAtISTE, I'm trying to gather as many resources as possible from #ISTE and put them into one Google Folder. I'm not even close to being done yet, but here's a link: https://t.co/l5xHLjZMd5 pic.twitter.com/S3BkeQgHve— Mr. Davola (@mrdavolatech) June 23, 2019
Shelly Terrell has put together a list of ISTE Ignite presentations.
That should keep you busy until ISTE 2020.