Heh, well personally I'm someone who's used about a billion different strategies, even ones that would seem totally idiotic. I'm gonna tell you some of the favourite ones that I've done though, although some of them are a little hard to use effectively since they're incredibly weird. But whatever, I'm a weird person. Anyways:
Super Fang team - This is obviously a team that revolves around Super Fang. I had the 3 super fangers in Pachirisu, Raticate and Bibarel, although I'd recommend picking 2 out of the 3...usually not Pachirisu but that was because it didn't suit my team. I usually go with 1 or 2 Encore users to give them some help, and a big finisher that can pick off the opponent's when they're at shit% health. Most of the time I would defintely recommend using only ONE encorer because a spinner is important if you want to keep up the assault. Shuckle is usually the best bet for an Encorer simply because he can keep going the longest out of all of them. It shits all over Stall teams which is a big plus considering the plentiful amount. Most Stall teams rely on that annoying whirlwind to accumulate residual damage, but if you use all 3, it especially screws them over because then half the time they'll be bringing in a super fanger who can just contribute a fang each time eventually leading to the demise of the phazer. I can elaborate more on this if people want since it is a cool team, but I want to say stuff about other kinds of teams too. This is an extremely rare type of team, and heh I think I'm the only one stupid enough to try it, but heh, oh well. :]
Knock Off team - Yeah, so this one revolves around Knock Off. Basically, this kind of team revolves around depriving the opponent of all their items which really neuters a lot of strategies. It's great coupled with damaging weather because since there's no leftovers that will be in play after a little while, you'll be whittling the opponent down for the kill pretty easily. Just remember, when you're making this kind of team, not EVERY pokemon on the team has to have Knock Off, just a good amount of them need to and then you can have some late-game sweepers to go in for the kill after.
Woot woot! - Encoring team. If you've battled me, you'd know that this is evidently my favourite kind of team since Encore basically ruins any sort of set-up taking place, and with good prediction, can render the foe completely helpless. Eg. Encoring a Thunderbolt and then switching to Dugtrio. This gives a guaranteed kill of something that may otherwise be wrecking the team such as a Motor Driven Electivire. Plus, you guys know my all-time favourite strategy of Encoring a stat-up and jumping over to Bibarel. That is one annoying strategy for the opponent, but I sure as hell enjoy using it. :) Basically, I usually keep my amount of encorers at about 1 or 2 so that my team doesn't lose too much variety, but still keeps the evil aspect to it. I always have Bibarel, Shuckle and Dugtrio on this kind of team. Mismagius works incredibly well too, as well as Breloom with those deadly Focus Punches.
That's what I've got for now, but yeah.