It depends on if you're heads up, against multiple opponents, if you flop any equity etc. In a heads up pot, I would say play your range and not necessarily just your hand. Meaning, if you open 89s and the flop comes AQ2 rainbow, this should be a standard cbet in a heads up pot. Even in 3-way pots, on ace or king high boards that are super dry, and maybe if you have a backdoor flush/straight draw or something of that nature, I would fire a cbet and double barrel on turns where we pick up equity (flush draws, open ended straight draws, etc).
When we go super multi-way though, like 4 or more players, you just kind of have to play your hand and bet when you flop a strong hand or strong equity. Bluffing 4 ways without a lot of equity isn't going to be a winning play in the long run, especially at lower stakes. Stick to these types of thought processes and you should do fine with suited connectors in EP!