[badclient]

I see this advice every now and then and always feel like it's missing a critical addendum:

if you are only getting rejected for a long period of time, be sure to take a step back occasionally to spot any glaring mistakes you are making in your approach

Because as much as getting rejected can help you grow a pair, if you keep doing the same thing again and again without building on the feedback you receive, rejection can do more harm than good.

[kfalter]

Totally agree with this. Feedback is the most important thing. I think the principle of this is simply to get out of your comfort zone, which may mean rejection (which may mean a learning opportunity).