In "Doctrinal Discussion" Don Englund answers this question with several points. In part, he writes:
Heaven will not be a long, exhausting church service nor a continuous vacation. There will be meaningful work opportunities and responsibilities. No one will be unemployed. There will be constant anticipation, continual discovery, overwhelming gratitude, and the joy of being a partner with God himself!
Source: Christ, the Triumphant Lord: Adult Teacher's Insights, page 78.