Some of these tips are ones that I wish I had gotten started with earlier. Others are due to the offerings on the World Wide Web.
Use maiden names for females. If you don't know the maiden name, don't use the married name in its place -- that will only trick you into thinking you've got it. Use underscores instead, _____.
Also, use European style dates, e.g. 8 Sep 1956. The jumble of numbers and out-of-order American style can be confusing.
The more difficult aspect of talking with living ancestors/relatives is recording their stories about their childhood. Things they remember about your ancestors who are no longer alive are especially valuable. It may make you uncomfortable, but saving interview on tape (sound or video) will be a great thing to have a few years down the road. Ask them about their parents and grandparents specifically.
You may even want to make copies at camera stores of some photos to share with your siblings or cousins. That way as the family spreads out, some of its history can go with it.