Time Controls

So, I've got this analog chess clock.  When we play, I set the clock to 5:30 so that after a half hour runs out, the flag will drop when the clock shows 6:00.  That's all great, but I have a couple of questions.

I've been poking around on the Interwebz and I can't find a standard set of time controls.  What time controls do most "standard" games (as opposed to blitz games) use for tournament play?  At the moment we are playing 30 minutes per side, sudden death.  It sort of sounds like standard TCs are 40 moves in 90 minutes and the remaining moves in 30 minutes of sudden death.  Is this what is normally done, and if so, how do you deal with the extra 30 minutes?  Reset the clock after 90 minutes so that the flag drops at the appropriate time, or just let the clock run and forget about the flag?

Thanks for the reply.  That's useful info.  If I'm going to play, for instance, 90 minutes + 30 seconds per move, how do I use the analog clock to time that?  Is it even possible?  Even if I do 40 moves in 120 minutes and then 30 moves in the next 60 minutes, it's not clear to me how to do that with an analog clock.

You can't do time-delay or time-increment with an analog clock.  That's just for digital clocks.  Usually, analog clocks are given a larger time control.  For example, it might be 55 minutes + 5 sec/move for digital clocks or 60 minutes for analog clocks.  As to the 40/2 SD/1 (which is USCF shorthand for 40 moves in 2 hrs and rest of the game in 1 hour), I believe you set the clock so that the first time control ends at 6.  You would not adjust the clock any when the first time control is met.  Any time unspent in the first time control is usable in the second time control.  For example, if we played a 40/2 SD/1 game against each other and you used up only 1 hour for the first 40 moves, you would end up with 2 hours for the rest of the game.  If I spent an hour and a half for the first 40 moves, I would only have another hour and a half for the rest of the game.