Anti ice
There is a lot of misunderstanding out there about anti-ice and de-ice procedures. I have not flown the B737 NG but have flown a lot of Boeings as well as L1011 and BAC 1-11.
On the ground de-icing fluid is applied to clear the aircraft of contamination and then protect it to the end of the 4th segment (1500 feet). You should not use wing de-ice (heat) as this can cause 2 problems.
1. Bake the fluid onto the leading edges.
2. If you loose an engine after V1 you will not have enough thrust to complete the take-off segments.
Engine anti-ice does not affect the thrust as all you are doing is giving a bit more throttle to make up the difference, so it stays on if the temp is +10 or below and there is visible moisture. The reason for the +10 and not 0 is due to the pressure drop at the intake and hence temperature drop.
Remember that your holdover time for fluid starts when the application is finished not when it is started.
On go around the wing anti-ice should be switched off if you have a single engine go-around for the reasons cited above.