How do I resume log shipping? I was log shipping. I disabled the jobs, and restored the database on the secondary machine and used them for a bit. Now I want to undo this. I don't care about history or syncing, I simply want to turn log shipping back on and carry on my merry way.

I enabled the jobs, but 'running' them (right click > start job at step, if that's how you run them) just pops up and says success but nothing happens.

I am unsure of how I can start the log shipping going again. I tried deleting the databases from the secondary machine but that didn't help either.

Any ideas? Surely it's a simple thing?

Edit: Still at a loss. Says the job was successful but nothing happens, no database is created. It was working fine before I took the databases out of recovery on the secondary machine.
You need to take another full backup from the production database and restore it to the log shipping server in NORECOVERY mode.  Then the log shipping should be able to restart.  You may need to remove the log shipping and put it back by going through the wizard depending on how you set it up.