Here is a helpful tool for you if English is not your first language. Learn the proper tongue placement, jaw position and hear the sounds. It's simple and seems to be free.
I hear from some folks who want to remove their foreign accent. Most of the time the accent is an advantage because it make you sound exotic and listeners tend to listen closer when they notice an accent.
If people are having trouble understanding your words it might simply mean you need to slow down and better enunciate your words.
Check it out - English Accent Coach
Presentation Tips on Twitter Presentation Skills Club on Facebook Executive Speech Coach, Business presentation tips from George Torok, the Speech Coach for Executives
