I used to travel a lot and if you choose to make an enemy out of an airline over a lost bag, it won't take long until all the airlines are your enemy ... then you'll either quit flying or pay your enemy.
Here are a few tips:
- Travel lighter! I was very careful to keep track of what I did and didn't use on each trip. There were very few things that went back into the suitcase if they weren't used (a brief-case umbrella and a tiny sewing kit are all I can think of).
- If you're traveling for several weeks, pack 5-7 days of clothes. Often they can be worn more than once without washing, and most hotels have laundry services.
- Traveling with kids is hard (I have four) ... especially infants. If you paid for a ticket for your child, they get a carry-on and a personal item too - even if they can't carry it.
- Rollie's are great but you can make them better. You can strap the handles together so that a whole set of rollies can be pulled via one handle. Some matching sets of luggage include these straps.
- If you do check a bag, make sure you can afford to lose what's in the bag. You will NEVER get the value of that bags contents back from the airline, so keep the value low.
- Keep your toothbrush, deodorant and at least a set of underwear in your laptop/personal bag (unless you also carry on your allowed piece of baggage.
Finally, the whole travel process can be irritating. Ticketing can earn an enemy quickly if they can't deal with missed flights, delays and cancellations in a reasonable way. So the real tip here is to not stress about it too much (hard for type A personalities). If you let a poor travel experience ruin your trip, you've lost more than a bag.