work efficiency

Just read one article from the latest Money magazine about work efficiency. I think it is very helpful. There are four main points:
1. Focus on BIG items to do (control the temptation to do SMALL items)
Big Items are most meaning things.
2. Do not open EMAIL in the first hour at work, instead of that, sort things out first.
At most EMAIL will delay for one hour, but you are guaranteed to have a clear thinking for that day.
3. Stop multi-tasking
It takes longer time to resume your thoughts. Take a short break and continue.
4. Get off half an hour earlier.
You will have the ergency to finish your task ASAP.