First, rather than doing lots of small washes every day, why not let the washing build a little and put on a full wash every two or three days? No matter how many clothes or other items you have in the washing machine, it is still going to use the same amount of water so it is wise to wash in large groups.
Also, only use a hot temperature when you really need it as there isn't that much difference in effectiveness but there will be in your bill.
In addition to this, there are also small things that you can do such as cleaning the lint trap before using the dryer. When doing this, you will be reducing the amount of time required to dry as well as removing a fire risk.
If the weather is nice outside, why not hang your clothes on a line instead of wasting energy? When you start to make these little changes, they soon add up and contribute to a cheaper bill.