One thing after another
After I'd locked up,I went to bed (Or,more formal,'After locking up'.We don't usually use'After having locked up...')
We went to the castle.Then,we caught a bus to the beach.
First we went to the cinema.After that,we had a meal.
He fell ill and was admitted to hospital.He died soon afterwards.
Following my visit to China,I became very interested in Chinese films.

Time when

When I'm rich and famous,I'll buy a yacht.
As soon as we've packed we can leave (immediately after)
Once we've finished we can go and have a beer (not specific)
I stayed in that ospital the time I broke my leg.
I met her at Ken's wedding.On that occasion she was with a different man.