Originally posted by: Trippin315
Start with 
this.
the rest will follow.
		
 
		
	 
Hahahaha
Seriously, if there are things you want to change you need to start making yourself do it. Changing a part of your personality you don't like, going to the gym, working towards a better job, whatever it is: set your goal, keep it in your mind, and think before you do something. If you want to change something about youer personality, before you do something think if that is in-line with what you want to change. If its not, don't do it. Do/say/think something that is in-line with what you want to change.
If you want to work out more, don't pussy out on going to the gym. When it comes time to make the trek to the gym or whereever, don't even think about it. Don't consider your alternatives or options. Get your gym clothes, whatever else you need to take, etc and just go. Figure out a good, set work out plan. Have a definite plan for each trip and it will be easier to get it done.
If you want to improve your job, figure out what you want to do. Then figure out what you need to get there. More experience, more education, more contacts, whatever; and then do it. Take some classes if you need more education; if its a promotion, ask your boss what you need to do to move ahead; if you need to talk to people in that industry, make friends. Just contact people and ask them if you can ask some questions about their field.
Make a set plan, at least in your head, and stick to it. It's the only way to get stuff done
EDIT As far as being lonely and isolated, starting taking up interests that encourage communication. A gym isn't a bad place if you find a lifting partner. Some kind of outdoor activity; running, hiking, sports, etc. Or maybe just for practice you can do one of those speed dating things, just don't take it seriously. Just talk with people, get comfortable interacting with all the different types of people, and relax about it.
Hope that helps some