To get what you want at work, you need a strong and impressive personal profile. This doesn't mean changing your personality, but simply capitalising on your strengths, and minimising your weaker points. They key areas you need to work on are:
Let's take these one at a time.
Personal image
The way you come across to people is an important part of how they assess your value, so it's well worth sprucing up your personal image. This isn't a matter of trying to turn yourself into someone else - that never works - it's a case of building on key strengths and minimising weaknesses. The most important characteristics which give you an image of success are: personal appearance, energy and positive attitude.
One of the keys to improving your personal appearance is consistency. It won't work if you look smart four days a week but always look rumpled one day a week. The company dress code may be informal, but make sure your clothes are clean and pressed every day, not just when you have important meetings. And dress appropriately for the job, not forgetting accessories, etc. If smoking isn't part of the corporate culture, keep evidence of it well concealed.
As far as energy levels go, we can all inject more dynamism into our behaviour. Those people with high energy levels are invigorating and inspiring to be around. There are some simple techniques for projecting energy, which include speaking clearly and not mumbling, meeting people with a smile and a firm handshake, making regular eye contact when you speak, and saying "hello" promptly and with enthusiasm. Don't always wait for the other person to speak, be the first person to initiate a conversation, and sound interested in what others say to you. Think about notching up your speed, too - you don't have to rush around or speak at a gabble, but move and talk at an upbeat pace.
As for a positive attitude, you may need to work on this if you're a pessimist (OK, OK, sorry, I meant realist)! Make it a rule that you never bring a problem to your boss without a solution. It may not be the best solution, but it gets you out of difficulty and gives you a proactive image. Realists are useful in ensuring that potential problems are identified well in advance, so don't stop pointing out the pitfalls - just make sure you present them in an acceptable way.
There are three ways to make a realistic objection sound positive:
Likeableness
Popular people do better at work, and are more likely to get what they want. They are more fun to have around, generate a positive atmosphere and improve morale. If you're less popular than you could be, take a look through this list and see where there's room for improvement:
You're also bound to succeed better if you are regarded as being trustworthy and reliable. So make sure you don't break confidences or act disloyally. Show you can be trusted to get tasks done, especially when they are urgent or important, or running late. Consequently, when there's a sense of panic, your boss will be more likely to put you in charge.
People who are open and honest are also seen as more trustworthy than those who are private or secretive. It's not fair most of the time, but that's the way it is. If you're a private person, try to be a little more forthcoming about yourself. You don't have to bare your soul; just join in talking about your holiday or discussing your favourite music, or a childhood anecdote. It will help your image.
Visibility
Last, but not least, aim to improve your visibility. You want your name and face to stand out from the crowd. Here are some ideas which will help: