How to cope with sytem noise of DAQ?

I found that my system noise is too much for my data acquisition.
the frequency range of the noise is so wide and the magnitude is comparable to my useful data.
Waht can I do to acquire my data?

What is the noise amplitude, sampling rate, the environment in terms of electrical devices and EMI/RFI, and any means you have implemented to reduce noise (shielding, grounding, cable lenghts and routing, etc). Trying to get some clues to assist. You can always take multiple acquisitions and average the data to effectively remove some effects of noise.
Do you have an oscilloscope to verify presence and nature of noise?
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"It’s the questions that drive us.”
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