You can go to Shop and pick Decorations. The number of stars is the experience you get if you buy that decoration. A Viking vessel for $1,000,000 will get you 1,000,000 experiences stars/points. I've found that saving up 350 Amethysts and spending them with a Caravan Ticket has been the best. You get 21,000,000 experiences. But remember the higher your level the more energy you use digging. Build up as much of your camp as you can before you leave Egypt.