I am holding NVDA, XLF, RIMM, DRYS, and so on. In my opinion, XLF and RIMM might have good chances to recover more quickly than NVDA and DRYS. So if I got margin call and I could not get any cash, such as a loan or from line of credit, I would sell NVDA and DRYS. Otherwise, my broker would randomly choose any stocks to sell. They may sell out my RIMM or XLF.

I could not tell you if you should sell some now or use other methods, because I do not know if we are near the bottom or will fell further. If you believe that we are almost bottomed or we will have a quick rally, then you can use something like credit card money for a few days (their rates are very high) so that you have these several days to sell in the rally.

If you sell now and markets fell further, you avoid losing more.

hard situation

In a bear market, or even a normal market, try not use margin. My shares had been forcefully sold by IB before.