Try breaking first ball and do the following:
1. Put the CB as close to the headstring as possible, a little off center.
This gets you as close to the rack as possible, with a little angle to create a better chance at making balls.
2. Bridge on the slate, not on the rail.
3. Closed bridge with palm on the table.
4. Bridge approximately 8 or 9 inches from the CB. This should be close to the pivot point of your break cue, unless you're breaking with some kind of low deflection product, in which case bridge about 10 inches from the CB.
5. Aim at the dead center of that first ball, couple practice strokes then go.
6. Don't try to kill it, just try to hit the center of the CB, nice and firm, and give a snap of the wrist just before impact.
These tips may seem obvious but I see people breaking straight on who bridge on the rail and you lose so much by doing that. Good luck!