Working effectively does not mean working too hard, having no rest and generally behaving sour. Here are specific things to do to increase the level of effectiveness in your career work.

Keep your desk and your files organized to avoid wasting time shuffling through piles of paper. This enables for faster location of files and reduces frustration in looking for important documents under piles of paper.
Go through your inbox at the beginning of each work day. Either throw away, file or follow up on each item. I have discovered that each day I fail to check my mail, I’ll have to spend more time than necessary reading them, and deleting unwanted mail.
Prioritize a list of the tasks you need to accomplish that day. The best way to plan your time is to make a to-do list of every task you foresee doing for the day and start from the most urgent or important. Make your list flexible to accommodate any emergency tasks that may come up.
Delegate tasks to co-workers and assistants if possible and free up your time to do only the really important tasks. Shun the do-all-myself mentality. It will only make you take work home which is bad enough.
Finish one task before you go on to the next. This will help clear your desk faster rather than having half finished tasks clustering your desk.
Reduce paperwork by storing important information and making use of the computer or electronic organizer.
Communicate effectively and plan carefully to make sure tasks are done properly the first time around.
Schedule time when you’ll be available, and let colleagues know, to avoid constant interruptions. Close the door if you need to.
Take breaks. A short walk or quick lunch away from the office will increase your overall productivity.
Before leaving for the day, tidy up your desk and make a short list of projects you will need to do the next day.

Try not to take work home. It’s never a good policy. You are meant to enjoy your work and not be enslaved by it.

http://nairabrains.com/category/personal-development/career/

I enjoy listening to music while at work, especially work i'd rather not do.

Hard rock preferably in this instance.

Makes it feel like it aint work.

This dude is just flogging his blog.
But we can put a spin on it for him

Some people visit FaceBook.

Others, Nairaland!

First thing first, pray to God before you start anything for the day,just one to two minute of thanksgiving and prayer will go a long way to increase your effectiveness, remember,we are human,mistakes do occur,consciously or unconsciously. God bless you. God2man.