I have only lifted a couple and the few trace repairs I have done were from intentional breaks. I do know that (at least on single sided PCBs) that the pads are glued down though I am not sure what type of glue is used. The biggest piece of advice that I can give and I have seen mkawa along with others use for not lifting pads is "Get in, Get out". Just keep you iron set right, 350°C for 63/27 not sure on lead free, get it melted, do what you need to do and get out quick. That being said, if desoldering and re soldering a single sided board multiple times you are probably bound to lift a pad from time to time regardless of how careful you are.
That being said I have two suggestions for trace repair. I will list them in order of ease of being able to do the work, with the easiest being first.
1. Follow the trace from where the broken pad is to the next solder pad and simply connect the pin at the lifted pad to the next one down (or up) the line, it shouldn't matter which direction you go so long as you are on the same trace. This is what I did when I modified my Das for the HDD activity LED mounted above the switch instead of the stock below the switch orientation. For this I had to add the LED and rotate the switch from stock placement. This meant drilling holes through the PCB and breaking traces. Wasn't to bad really.
2. Scrape the solder mask from the top of the trace next to the location of the lifted pad. Then take a piece of a clipped lead from a diode or an LED and simple connect the trace to the pin of what ever you are trying to solder. This will be more difficult to actually accomplish as you are essentially doing SMD style soldering but has a much cleaner and professional look to the finished job.
As far as gluing the pad back down using super glue or jbweld, I can't speak for that. Though I would say that if the pad is still attached to the trace than you would have a much better chance of it working. If the pad completely separates from the trace, you will still have to connect the pad to the trace electrically.