I press ctrl-space and the list of possible code completions is shown.
I choose (using up/down keys) the desired item.
Then I have to press Enter and the desired item is placed to the edited document.
Enhancement:
It is not necessary to press Enter. The item should be chosen after I continue writing (without pressing Enter). The item will not be chosen only if I press ESC.
In today state only Enter will choose the item, and other activity cancels the code completion.
Desired state is negative: Only ESC will cancel the code completion, and other activity choose the item.
This enhancement would be helpful for faster code editing.
Again, taken from Visual Studio