I find that the best way to sync myself for music games is to play a song twice.
It's a little tedious, but usually, if I haven't played a particular version of DDR, or IIDX, or guitar freaks in a while, I'll usually just play one song I'm paticularly fond of twice in a row. Usually, the first time I get a terrible score, and the second time I get a score in my typical range.
Case-in-point:
6 or 7 months ago, I grabbed my copy of DDR Extreme 2 US homeversion and started testing out an early model of one of my dance pads. I played a few songs, and it worked alright, so I decided to up the ante and try a 9 on it. I scrolled through the songlist for a familiar 9 and wound up on Be Lovin.
First play:
[bunch of perfects]
27 greats
4 goods
0 boos
2 misses
Second play:
[bunch of perfects]
3 greats
2 goods
0 boos
3 misses