Randy Alcorn scoured Scripture for years, studying, cross referencing and meditating on what is said about heaven. The end result, in addition to deeper understanding of what it will be like, is the realization that we should be thinking about heaven now, and aligning our actions and attitudes to reflect an eternal perspective.
I'd highly recommend his book Heaven, as a starting point, or the daily blog posts on his ministry website, Eternal Perspectives Ministry.
In today's blog post, Randy asks a question that strikes to the very heart of our thinking about heaven:
Will we drink coffee on the New Earth?