I've had the same problem with cannabis, it can cause mania in me but also once I'm going manic I loose my judgement and smoke it which makes me much worse.

I don't think there's any way to avoid it once you're manic, the focus will have to be on not going manic in the first place.

For me it mainly involved a good Doctor( and hence medication), this can be difficult especially in out of the way places.

Also abandoning the idea that there is anything good about mania was key, for a while I thought it helped with creativity. I know a lot of bipolar people who cling to fantasies that it is a key to something special like genius or being super-entertaining, they keep getting sick.