Hello bergentulip,
It sounds like you've found your own way through this already but I have to admit that I'm a big fan of the 'Supernanny' approach which has worked like a dream for us (a) first time round and (b) after illness meant DD's nighttime routine went completely to pot.
We did all the usual bath, milk and story business, then put her to bed and left. When she got up, we put her back to bed with a 'night night'. When she got up again, we put her back to bed with no talking or eye contact. I then sat still in the doorway, and each time she got out of bed, I calmly put her back - still with no talking or eye contact.
This was really hard the first night, when she tried everything ("Want poo Mummy!" "Want milk Mummy", screaming, crying, flailing arms, etc) to get my attention. But eventually (after maybe 45 minutes?) she got bored and fell asleep. I suspect an older child would take more effort (DD is coming up for 2).
The second night was easier and didn't last as long (and was also helped by the fact that I remembered to bring a crossword and drink with me so I didn't get as bored and thirsty during the between-tantrum intervals!)
On the fourth night, she went straight to sleep when we turned the lights out, and continued to do from then on. What bliss!
After she was ill (when she had genuine reasons for wanting attention after bedtime), she continued playing up for a few nights until we did the same thing again. That time it took much less effort - probably because she knew that we meant business. Less than 20 mins the first night, five mins the second, then back to normal.
Now, she goes straight to sleep and if she's really tired will lie down and say "Night night Mummy/Daddy" without prompting - sometimes even before her story!
Now if I could just persuade DH to stay awake a bit later we might actually manage to get some 'us' time...!