There are some tips which will help in pest controlling on your own. They are :
Keep your premises absolutely clean.
Seal holes in cupboards, walls and tiles.
Use airtight containers for food storage.
Keep the dustbins clean and empty them daily.
Use fly screens on the windows.
Don’t provide any accessible food/water.
Do not keep dirty dishes in dishwasher/sink overnight.
Use door seals to avoid pests entering and so on.