Chicken bus prices in Guatemala are, very loosely, around Q10 ($1.35) per hour.
If you need to start a fire, you'll want some ocote.
The Livingston to Río Dulce water taxi runs at 9:30 AM and 2:30 PM and costs Q125 ($16.65).
The Livingston to Punta Gorda, Belize boat leaves from Livingston on Wednesdays and Fridays for Q
The Livingston to Puerto Barrios water taxi (colectivo) leaves the Livingston main dock
Lychee fruits are tasty, reasonably high in vitamin C and fairly cheap.
Don't throw toilet paper, or anything else, into Guatemalan toilets.
Ice cream beans in Guatemala can be bought for around Q1 ($0.13) per pod.