Rules for using a paid intraday call service

#1
Rule #1: Never take all calls
Rule #2: Never take any call against a very strong nifty intraday trend
Rule #3: Never believe call services WORK better than your strategy

I'm a newbie who's holding on to rule 3 but want keep myself afloat untill the day my strategy works!

I've used broker provided call service, now I'm using a major media network call service. So please add rules on how you've been able to make best use of your subscription.

So please share your rules (or a private reco for a service you USE)

I've read many threads, but a post by oilman5 in 2014 is worthy advice (against services).