Minimize error in op.amps?
Negative feedback is needed for most regular op-amp circuits and this will stablize your the open-loop frequency resonse to the closed loop (and perfectly reasonably flat) frequency response. It will also provide just the right amount of dc voltage fed back so you are not fighting against offset voltages and currents. But what it won't do is minimize offsets and there will be a dc offset on your output representative of input offset x circuit gain.

The uA741, like a lot of op-amps, has pins where you can connect a potentiometer to correct offsets and they do a good job but, the real niggly offset errors related to temperature, cannot be nulled this way.

To reduce offset voltage, the most effective way is to get a better op-amp. There are complex methodss of doing it that involve using a 2nd op-amp but i'm not going to go into this because, for the vast majority of applications requiring better dc accuracy, it's better to get a better op-amp and, almost certainly, most op-amps are better than the ancient uA741.

Bias currents can be easily reduced with matching resistances in both inputs (the effect of the bias currents cancel out) but, offset currents are a bit trickier and the best way is by having small resistances for feedback and input connections. However, this isn't always convenient and so it's a trip down the shop for a better part.

This is a decent article about voltage offsets from Analog Devices - it's called Op-amp input offset voltage (MT-037)

MT-038 is a similar article about offset currents and here is a picture of an op-amp open loop response before (red) and after (blue) feedback has been applied: -



The frequency response is now essentially flat with a gain of about 20dB from DC to about 1MHz. It's not for a uA741 - it's representative of how feedback works.