LOL well when I was working at Jiffy Lube and got all the Mobil 1 I wanted for free, I would do it every 2500 miles.
Now that I have to pay for it, I do it every 3000 to 3200 miles. Many people will tell you that changing your oil at 3k is a scam and blahblahblah.....I see it as cheap insurance, and I bet my engine lasts longer
Fuel injection cleaners at about the same intervals....3000 to 3200 miles for me.
And as for tips/hints.....just jump right in and do it. Its really the easiest thing in the world. And if you get in a jam, call you local fast lube or your mechanic on the phone....chances are they will be able to help you out right over the phone.....I always did for people.