If you want to avoid ceiling water damage, you're going to need to make sure that your roof is in good shape. To do this, you're going to need to have someone inspect the roof, unless you know how to inspect it yourself. At one time, it appeared like every home I worked on had ceiling water damage.
If you have a ceiling water damage, there's a good chance that you have a roof leak and if you do not have a roof leak there's a good chance that you have a water supply pipe leaking directly above the ceiling stain. The best way to avoid this type of damage in the future from getting larger is to actually fix the problem today.
This may sound simple and it's something that everyone understands, but rarely does anyone ever do anything about them. I can not tell you how many times I've gone to a house to give an estimate, to work on or even to visit, only to find out years later, that the homeowner still has not fixed the roof.
I do not consider fixing the roof damage, placing buckets underneath the ceiling water damage. I consider fixing the roof damage, by actually hiring someone who knows what they're doing, or making your own repairs, only if you know how to do them correctly.
Your roof protects everything in your house and if it's leaking, it's not doing its job correctly. This may not matter to you today, but it will in the future, when you're home starts to suffer from termite damage, wood rot and even mold. I'm not saying that all of this stuff will happen to your house for sure, but there is a possibility.
Quit waiting for your roof to fix itself. There is only one way way that you're going to get rid of any type of ceiling water damage and that's to make the necessary repairs.