IMO, regular NEW can help a lot, indirectly. If something attaches to you for the purpose of feeding on sluggish, low vibration energy, and you get your energy circulating freely and powerfully, it's not going to want to stick around (though getting your system running like that before detaching the neg is a lot harder to do). It's also generally harder for new critters to mess with a well circulating energy system than one that's blocked up and not moving well. Imagine trying to block the flow of a trickling gardenhose vs. a firehose at full blast.

Of course, energy work alone isn't a cure-all; there'll *always* be something bigger and more advanced that could hypothetically throw in a few kinks, if it really wanted to, and a more active energy system does tend to attract more attention in general for better or worse. Although, it seems to me that once you've got your system to the point where it's not able to be fed on by "dumb parasite" type stuff, the kind of stuff that could get through gets increasingly less likely to do so without an actual premeditated reason.