you need the Activity point counter thingie - I think you get it in week 2 or 3? Basically you need to judge intensity and length of workout in relation to your weight to calculate your "personal" activity points!
Don't worry about activity points. Stick to the regular points and you'll be ahead! Activity points just confuse the issue. You'll lose faster if you stick to the 1200 calories or so on WW and do a lot of activities! Linda