The distinction between using especially and specially in a sentence is very slim and increasingly the inter-changeability of the two is creeping into the English language. That being said, there are some clear distinctions as to when each should be applied (even if that may not be the case in 20 years as the language lines continue to blur).
Especially typically means 'particularly,' so you would use it to emphasize your point. "The markets were especially volatile today" or "I especially like it when my french fries are crispy." Here you are emphasizing the importance of the topic.

Specially should be used to emphasize something done in a particular manner or specifically done. "These cookies were baked specially for you" or "This report was prepared to specially emphasize XYZ." Here you are emphasizing the importance of how this topic stands apart others.

Especially carries with it a sense of something being done that is particularly important and exceptional specially refers to something done with a specific purpose or with a specific meaning.

So now that you know the difference you can specially set time aside to write in a way that is especially significant.