Shooting with someone makes no sense unless they are willing to take some positive steps to help you.
The common thread ' portraits, pets, landscapes' is that you can take your time, get the lighting and redo shots.
Doing an event, you have none of those and you have to compensate with preparation.
Start looking at scenes and decide where you need to be to get the light right and how you would expose to compensate for what you see.
Learn how to change your aperture and EC without looking - cause in events, you have no time.
Learn to lock the camera into a stable hold with arms tucked against body.
Practice framing quickly and shooting a bit loose to make up for haste.
Review your shots to see what you are doing wrong technically.
I try not to have to change lenses.
I shoot with two bodies - a 24-70 equiv on one and 70-200 on the other and circle the space.
I get general shots first then go back and head hunt.
Look for the shots that typify the event.
Move through the crowd like a man with a purpose.
Don't ask permission, just walk up shoot and walk away, saying thank-you.
If you need a pose or an arm moved, just ask quickly, take your pictures and do it.
Get the picture
You are looking for impact, faces - not perfection.
People and symbols
Example: This is a shoot I did of Dr. Terry Lakin's homecoming for a post on a political site and I wrote one for my own blog.
all the pictures and the
blog post
Bad overhead lighting, relatively low ceiling, police presence and I was told not to use flash in airport, relatively unfriendly crowd (the PR person walked away from the reporter when the reporter IDed herself)