There is a pricing scheme.  Learn it.
There are two prices for everything in Kenya.  There is a M'Afrika price and a M'Zungu price.  The M'Zungu price, or white man's price is usually at least 25% higher than the M'Afrika price.  This applies to everything except cell phone airtime, and groceries that are already marked.

Understand Kenyan Time
If one is told that a task will take an hour, and to check back then, come back in two hours.  However, one should be prepared for the task to remain incomplete for at least another day.  This is especially true for auto mechanics.

Mechanic Performance is Proportional to His Sobriety
However, his speech is not.  If one goes to the garage to check on the status of his vehicle, he must know two things.  First, one will have to figure out the status of the vehicle by how many parts are spread out under the mango tree, because one will not understand anything that Kalamu, the mechanic, is saying.  Second, if Kalamu smells of alcohol, one should not expect any progress until the next day.

Expect Road Blocks
While in America, one has to worry with dogs or dear crossing.  In Kenya there is a wider variety of obstructions.  My favorite would definitely be the pigs.  They are so big that if you hit them, more damage will be done to your car than to the pig.

Kenya will cease to exist if the cell phones stop working.
While many people in Kenya do not have running water or electricity running into their homes, the possession of a cell phone is vital.  News travels fast in Kenya, usually via an SMS (text) message.

Know the teas.
While many people enjoy their tea with a little milk for flavor, Kenyan tea is really milk with tea for flavor.  In other words, Kenyans enjoy their milk with tea rather than their tea with milk.  Kenyan tea looks like a mix between chocolate milk and plain milk, coming out as a grey color.

The Second Church Service Cannot Happen Unless the Clergy (?) have had Their Tea.
It is vital that the clergy and church staff have tea between the early service and the second service.  Without the tea the show can't go on.  Also, mandazi (kind of like a sugarless doughnut) are always a welcomed snack with the tea.

Kenyans are born stunt-drivers.
Kenyans seem to pull of various feats in cars and motorcycles (piki-piki) that Americans would never believe to be possible.  For instance, 2 feet deep mud puddles (on dirt roads) are not an obstruction but a simple nuisance for the piki-piki drivers.