Using Sensors

[thoughtful]

Hey,
i have some question about using sensors for an autonomous mode, last year we had a simple autonomous, with jus some values to the PMW's and it worked about 75%, so it was a good one, cause we were rookies.

Any ways i jus wana clarify on how will u go to programming the sensor autonomous. From what i understand the reflector sensor return a value of 0 or 1 and based on that you can have your robot move. I have one question tho, what if your robot if going straight and the reflector tape jus has an curve as in it turns, and now u get a value of 0 from the sensor, how do u get about to calculating which way to turn.

The other way to program this might be to make it turn a little al the time(as in go left and when the sensor is 0 go right and vice versa) but i dont think this way will be very fast.

Last thing which type of autnomous do you prefer and if u prefer sensors which sensors you prefer.
thanks a lot for ur time.