Many thanks for your responses.
So as I understand it,there are two ways to achieve what I am trying to
do: either through diary, or through capture.
I am not sure which I should choose, though.
Since it seems my initial message was somehow unclear, let me try to
explain what I am trying to achieve again.
I have only one agenda file, ~/gtd/agenda.org.
It consists of only headings with active timestamps.
When I want to schedule a dinner with John, what I currently do is:
1. C-c a a
2. Look for a date
3. (say I find that April 1st isalright)
4. quit the agenda view
5. Visit the buffer corresponding to ~/gtd/agenda.org
6. Go to the end of that buffer with M->
7. Add a heading like
* Dinner with John
8. Use C-c . to add the date, 1 apr <ret>
I am fine with steps 1 to 3 but would like to do steps 4 to 8 in a much
more efficient way, without having to re-enter the date, but with the
same result,i.e. the heading being added atthe endo of ~/gtd/agenda.org
Do I make more sense this time?
Thanks again for you help!