Default Manage tasks/processes (keep them on)

How can I control/see which programs stay open in the background and which are closed? I have LMT launcher and no matter what I do it doesn't stop working (kill all running apps, CM memory boost etc) and that's great. Now I downloaded a few apps like juice defender and phone usage tracker and I want them to work properly but it seems that something keeps killing their processes and they stop doing what I need them to (turn my radios on/off and monitor my data usage) how can I stop that and make them always run in the background like LMT?