How can I share one power supply between an arduino and servos? I'm trying to power an arduino and a few modules (RF receiver, two servos, and a laser diode) through one power supply.
I get jittery/unresponsive servos when hooked up in the following configuration:

power supply goes to usb breakout, joins with top + and - rails, powers everything (tried
all grounds go to top - rail
black/grey/white wires going off right side are power/ground for the servos
red, green, yellow wires going off left/top side are signals to the servos/laser
purple wire going off left/top is ground for the laser


If I remove the orange wire (usb breakout to + rail) and plug another power supply into the Arduino, the poor performance disappears and everything works nicely.
Since my power supply is 2.5A, I doubt that I don't have enough power for this setup. This leads me to believe that the Arduino/receiver side of the circuit is making the voltage unstable so the servos misbehave. Is there a way I can isolate these two parts of the circuit (diode, capacitor?) so that I can power the whole setup with one cable?
Components:

Arduino pro micro (5v)
RF Link Receiver (WRL-10532, 434 MHz)
Servo (ROB-09065, sub-micro)
Laser diode (5V, 20mA)
Micro USB breakout (1A)
USB Micro power supply (5.1V, 2.5A)
You need to figure out your total current requirements. Don't guess, figure it out. What is the peak current draw of the servos? of the other components? Add everything up. If the total is within 20% of your power supply current, that may be the problem.
Also, servos tend to draw spikes of current. You might need to add a filter capacitor to the +5V rail on the Arduino to even out dips as the servos cause sags in current before the voltage regulator in your power supply can compensate. (Put the cap between +5V and ground right at the Arduino.)