Three basics;
Have good tension, the blade should not move side ways more than 1/8". have good speed and low feed rate. If not enough speed, you have a tendency to start pushing too hard into the blade. Let the blade do the cutting, they say.
Most blades have a burr on the right side what makes them cut to the right. You have to move the wood some degree to the right to stay on the line.
The UR series cuts more straight.
FD Mike