One of the things I typically do is I don't really think about "bluffing" as bluffing in the following sense:
I simply consider the range of hands my opponent has, and think about how likely it is that my opponent will fold. In my mind, I don't really "bluff", because I'm making a bet under the assumption that my opponent folds.
I realize this might seem silly on the surface, but the mindset change can help with giving off tells
in live games: I'm not betting my hand, I'm betting that I think the opponent will fold.
(That said, you'll need to have a backup plan for when the opponent calls, but start with the former an build the latter).
I do however agree with other posters that in most loose games with friends, bluffing is rarely needed.