McDougal says the best way to approach prison is to view it as a time to get to know yourself better.
"So I would tell her [Martha Stewart], it's a time for reflection, a time for quiet, and a time to get in touch with herself and she'll do fine," McDougal said."I got through it and she'll be just fine."
Stewart will be sentenced on June 17.
In a statement on her Web site, just minutes after the jury's verdict, the domestic diva said "I will appeal the verdict and continue to fight to clear my name. I believe in the fairness of the judicial system and remain confident that I will ultimately prevail."
ABCNEWS' Pierre Thomas contributed to this Good Morning America report.