This article is from Dubai: Need to Know.
Arriving. The impressive Dubai International Airport is in the Garhoud area of town, allowing easy access to most parts of the city. Taxis are the best way to get into town; the rank is on your left as you leave the terminal and the meter starts at AED 20.50 ($5.60) rather than the usual AED 4 ($1). A trip to the northern end of the Jumeirah strip will set you back about AED 90 ($24); to Sheikh Zayed Road it will be about AED 60 ($16).
Getting Around. Public transport is notable by its absence (although a metro system is on the way), walking is restricted by the heat and motorways, and driving is not for the faint of heart. So your only real option for getting around is taxi. Thankfully taxis are reasonably inexpensive and easy to find. All taxis are metered and can be hailed from the street or ordered by calling 04-208-0808. Fares start from AED 3 or AED 4 when hailed from the street and are judged on distance rather than time. Try and have change handy, as Dubai's taxi drivers have an aversion to large notes.
One additional word of warning: Traffic jams are a sad part of Dubai life, particularly when trying to cross the Creek. The introduction of a toll to cross Garhoud Bridge has eased traffic a bit over the water, but it has also pushed the gridlock onto the side streets. One wrong turn and you'll end up spending most of your time being in the back of a cab.
When to Go. Between October and April, the weather in Dubai approaches perfect. The temperature hovers around 26 degrees C (79 degrees F) and there's rarely a cloud in the sky. The summer is not quite as welcoming. Temperatures routinely exceed 50 degrees C (122 degrees F) and humidity soars; it's incredibly unpleasant to be anywhere without air-conditioning. The city is geared up for the summer onslaught, however, and you can survive by running between air-conditioned buildings and air-conditioned taxis but it doesn't make for the most enjoyable trip.
Tipping. Hotel bars and restaurants tend to include a service charge of between 10% and 15% on their bills. Unfortunately, this often goes straight into the company coffers rather than the pockets of those serving you, so if you are particularly impressed with the service you have received you will need to tip in cash on top of this. It is common to tip taxi drivers by rounding up to the nearest AED 5 while for other services such as having your petrol pumped, bags brought to your room or car valet parked it is usual to tip between AED 2 and AED 20.

thank u this is a really informative article as i am thinking of travelling to dubai very soon