I read some horror stories about hair dressers chopping too much hair off.
A good tip is this....
When you have washed your hair bend your head towards the floor (as you do when you put a towel turbon on) and comb your hair towards the floor.
Grab the hair from you rforhead down and twist it until it is twisted to the very end.
Now cut off a few cm's or inches (whatever you want off) straight across the end.
Now keeping a hold of your hair use the scissors to snip upwards on the ends roughly.
Brush and dry as normal and you will have trimmed your hair and also give yourself some sexy layers.
At least you are in control of how much you chop off girls.
I hope this helps.
Has yours come through yet?