This is a guest post, originally published by Philippe Humeau which he was kind enough to translate to English and allow us to publish it here. I found this post awesome and really wanted it to be shared with much broader audience in English language.
NBS System is a managed hosting company working mainly on Magento so they have a lot of Magento hosted to put it short (~200 sites). They also maintain a blog regarding Magento optimization and this is a translated post from it (Wikigento):
Here is a small contribution of the support and commercial best phones call, along with other « real life » experiences. The worst questions, the silliest ideas, the best wills hybridized with the worst technical solutions, just see by yourselves.
PS : We always laugh with no bad intentions. Every jobs has it stakes, constraints and problems, one’s difficulty is not to be laughed at but our day-to-day life can be rejoiced by some juicy results ! We also make mistakes, who don’t