Some of the things that I've picked up along the way from people that I admire:
Take the time to learn the names of the people that affect your ability to succeed and say hello to them by name when you see them. (IE Rampers, agents, etc). By doing so, you're most likely to get assistance before other folks who haven't done so.
Do the best that you can at your own job and encourage others to do the same.
Don't get bent out of shape about the things you can't control (like staffing, lost bags, full gates).
Don't take out your frustration on the ramp staff- odds are they are 3 people short, working in ****ty conditions for marginal pay. Yelling at them sure isn't going to get things done any faster.
Life is too short to spend it screaming at operations over the radio.
Take a moment each workday to smile at a customer and thank them for flying.
Give cockpit tours. When you do, take a photo with your own camera and offer to email it to your passengers.
Always carry an updated resume and business card. You never know when something better might come along.
If it stops being fun, figure out why. If you can't, it's time to consider something new.
Invest in yourself and your family before all else.
Establish a good relationship with the CP and schedulers whenever possible. Doing so can make life easier down the road.
Be flexible.
There's a whole bunch more, but I don't want to bore you!
