Online Webinars are the way to go for some really good "your time" PD. Look no further than TEQ's Professional Development Webinars website.
TEQ has uploaded all of their recorded webinars, covering topics such as SMART Notebook, the Educreations app, Edmodo, Digital Citizenship, Prezi and much more, on one convenient location.
Go visit http://www.teq.com/webinar-video and learn something new this summer to try out in the fall with a new group of students. You will be glad you did.