I just keep activity monitor open all the time. I've noticed that fan speed significantly lags CPU load, so it's difficult to notice and react in time. The one

I just keep activity monitor open all the time. I've noticed that fan speed significantly lags CPU load, so it's difficult to notice and react in time. The one that gives me the most trouble is mds_store, or the spotlight search indexing process. I disable indexing on basically the whole drive but it still spins up the fans every once in a while.