Here are the best answers for each blank:

1. **start**
2. **like**
3. **more**
4. **before**
5. **better**
6. **need**
7. **will**
8. **when**
9. **effectively**
10. **need**

So the complete sentences would be:

It is a good idea to **start** your homework early. If you can do it **like** your evening meal, you will have **more** time later to do things that you enjoy, **before** talking on the phone. It is also **better** to do homework as soon as possible after the teacher has given it to you, then if the homework is difficult and you **need** time to think about it, you will **will** have time to do it. Always turn off your mobile phone and the television **when** you are doing the homework. You will work **effectively** without them. Make sure you have a quiet place to work, with **need** light and a comfortable chair.