I am glad you know a stronghold when you see one. That in itself is wonderful! I know it stinks when they come back.
I ask Jesus to guide you and I pray that you can remember the truth of who you are and who you are meant to be in the kingdom. When I am under attack I increase the amount of time I spend listening to sermons, reading the bible or listening to praise services. Then when I wake in the morning the first thoughts are christian songs. Sometimes the negative thinking is there at the same time, but it is easier to ignore it.