Professionals will help more than you can. It's a tough one, though. I started stuttering at around age 5 or 6, my mom seems to think it happened at like 9 or 10, but I just hid it well. Depending on your location there may be some speech language pathologists who specialize in stuttering or dysfluency. I really feel that saying things like "slow down" or "think about what you're saying" do not help at all and for me make things worse. Girls tend to grow out of their stutter more than boys, which is why there are more adult males then females with a stutter. I never received good help until I was 18, which was a fluency shaping therapy, so basically developing a new speech pattern to work around the stutter, it didn't stick but I learned some good techniques. I think that the psychosocial effects are the biggest issue to deal with, rather than trying to fix the speech itself. I am 33 now, and still stutter every day but I have learned to not get down on myself about it and also that most people either don't notice, or don't care. There's always assholes or just ignorant people out there but there's no need to waste effort on pleasing those people.