To avoid being bitten by mosquitoes wear long sleeve shirts and spray yourself with some mosquito spray that is made to go on your body or clothes.
You can also eat some garlic as garlic when eaten puts out a body odor that mosquitoes will stay away from.
Also planting garlic plants around areas in your yard where you spend a lot of time at such as your patio etc will keep mosquitoes away from the area.
You can also make some citronella candles or even buy the citronella candles from stores to keep mosquitoes away from you.