When building a 3-betting and/or 5-betting range, I basically consider what my opponent's ranges will be for raising in the first place, responding to my 3-bet, and calling a 5-bet shove. Similarly, when I raise and get 3-bet, I consider what my opponent's 3-bet range is, how he will respond to a 4-bet, and if I can call a 5-bet shove, etc. It's pretty easy to figure out what you should be doing since the ABCD line of thought will give you a good idea of how to play different hands, but once you get in the habit of considering this you'll get better at doing it with good frequency.

A quick example: with 100bb stacks, a 16/14 opens from the HJ, and it folds to you on the SB. The BB is a nit like 8/4 or something, so he doesn't offer much for consideration as far as 4-betting you and that sort of thing. You already know how to figure out your value range and what sort of hands you should call with and what sort of hands you should be 3-betting as a bluff with and all that. However, what you probably haven't considered so much yet is how far you're going to stretch that 3-bet bluffing range. That is, where is the cutoff point? KJs? A7s? Q2o? 72o?

Well the typical 16/14 at low stakes will be folding the vast majority of his HJ range to a 3-bet out of the blinds if you don't have much of a history. A quick consideration for his raising range out of the HJ and what he'd be likely to continue against a 3-bet with will show that you'll be +EV by 3-betting any C or D hand as a bluff just from the fold equity, so you'd probably stretch your C range a bit to take advantage.

At the other extreme, if it was a 3/1 who only open raised QQ+, AK ever, and stacked off with his entire range preflop everytime, you'd never want to 3-bet bluff them. If they also tended to stack off with an overpair or top pair post-flop in raised pots, then you could consider extending your B-range (flat calling) to include more hands than it would otherwise since they'll get more value from being more certain to get paid off when they hit.