I can't offer any tips about getting over the fear of going to the airport, checking-in, the boarding process, etc.
The only thing I can offer is during turbulence, if you have a window seat or can see out through one, keep focused on the horizon. This is a similar tactic to combating seasickness, but I have found that for the really bad cases of turbulence, this tends to help a little. It helps remove that fear of being "stuck in a thin aluminum tube" since you have some perspective on the outside.
Best of luck!