The Dining Room at Marble House
The Bible tells us that the Lord will prepare a table for us. Our table (along with the rest of the furniture, and everything else as well) in heaven will be far greater than anything on this Earth. Yet it's hard to imagine what heaven will be like in an abstract way.
By looking at images like these of earthly wealth — and then at the same time thinking about how much better heaven will be, I find this helps me to fix my motivations more on heaven.
See also: What If You Actually Believed You're Going to Heaven?