Basically, what Dynamite Kid said - if you get some generic crappy indie band who've only just discovered that they can get laid by waving their instruments around on stage, you'll need a lot of questions and a lot of imagination to make the write up interesting.
If the band offer little more than monosyllables and cliches about loving the Velvet Underground, you can compensate by challenging them on why they think they're important enough to warrant being interviewed. It may seem entirely assholish, but it's better to be dickish and antagonistic at the time than to try and write it up and realise that there's nothing to write about other than four scruffy blokes who've got a girlfriend in the industry.
If you challenge a band, they have a chance to redeem themselves against the judgements that people reading the articles or listening to the show will already be making - if they have any nouse, they'll appreciate it, play up to it, and the interview will turn into a conversation - the more they say, the more scope you have to make something interesting out of it.
If, however, they've filled their nasal passages with powder in order to believe their own poorly written hype, you can just rip them in the write up, or, if it's radio, a bit of snide humour will keep the interview going. That's not to say be a complete Zane Lowe about the whole thing, but make sure you're able to stay ahead of them if you need to - a lot of research into them goes a long way, but be wary of re-treading covered ground.
Not all bands are hard work to interview, but some, often the ones who appear the most interesting, are horribly most precocious and will only open up if you pander sycophantically to their egos - I got to interview Adam Green, and it was like pulling a naughty kid up in front of the teacher - he gave every answer as though he was worried his cooler friends might be listening, and only loosened up in response to praise, and froze at any allusion to the fact that there might be other artists more relevant than himself. Granted, I got him on a bad day by all accounts, but those are the sorts of things to be prepared for.
Coversely, the most terrifying, interesting (and probably the best) interview I ever got was Death From Above 1979. They had the air of vultures surveying the prey of NME-reading student journalists, coupled with an impenetrable layer of understated awesome. They didn't like interviews, which they stated upon introduction, primarily because, as they said; "You'll just write what you want to write anyway". They were horrendously disillusioned, having spent a large part of their tour in the company of an NME journalist who gave them a thrilling write up about their facial hair and very little else.
The 'interview' that followed was a 45 minute verbal sparring which flitted around mis-representation, the flaws of press in general, why independent music is a farce, psychosis, egos, propaganda and eveything inbetween. There was enough in there to sustain the music pages for a year, and the interview over-ran by their choice as opposed to mine, which kind of made my month at the time.
One final point in this rather epic reply - bands who've been given media training are often dull as hell to interview because they've been instructed on the sort of things to say to make them look good, and they've said them hundreds of times before, no matter how conversational they make it seem. Also, if you're getting interviews through PR companies, they will try and tell you what you can and can't say - if it's a phone interview, the record label/pr people usually listen in - when I got Charlie Simpson, I was told UNDER NO CIRCUMSTANCES MUST YOU MENTION BUSTED. Near the end of a (surprisingly) good interview, I slipped it in, veiled with enough flattery but with the subtlety of a roaring juggernaught. He took it in good grace, but then their management graciously ended the call for us.
So...I'm gonna pick up the names I've just dropped, because it's leaving a bit of a mess on the board, but...good luck, and hope my ramblings prove helpful in some form or another.
