This is a list of 4 presentations available on the UGRC today that can be given over a year to a mixed technical level user group. There is a lot more content available on the UGRC so if you feel that these presentations don't particularly fit with your group then please search the "Find a Technical Presentation".
Q1 2012 - Tips and Tricks to Speed LabVIEW Development
Q2 2012 - LabVIEW UI Tips and Tricks Part 1 or Part 2
Q3 2012 - Basic LabVIEW Design Patterns (Here is a presentation and demo files submitted by a user group leader that is great and here is a more in depth presentation from marketing. Both cover similar material so feel free to take the best from both)
Q4 2012 - Data Communication in LabVIEW