When exploring a dungeon, we rarely hear anything when we listen at doors (even with a very high listen check result). We have walked in on some strong but silent types without warning. As a party I feel like we don't have enough player experience to know useful strategies. Our DM is also inexperienced, so there's mentorship in strategy to be found there.
What are good ways for relatively low-level characters (say levels 4-8) to get some idea of what is behind the next door, in order to figure out when it would be a good idea to use buffing spells?
For what it's worth, the party does not include an arcane caster, but does have a psion and a favored soul, as well as a scout-type character.
Trying a listen check at the door is standard, but what else might they try if the listen check fails to reveal anything (as often seems to be the case)? And even when something is heard, it's not necessarily helpful in terms of knowing "how dangerous" the thing we hear shuffling around inside the room is.
Casting augury outside every door seems a bit extreme.... but beats "wasting" multiple buffs outside every door "just in case" when many of them wear off pretty quickly.
In terms of resources, the party could probably pool together up to 10k gp for something, depending on how helpful it would be. But we have some basic needs as well (better AC, better weapon, better saving throws...), so expense is an object.