How am I flying around the world in some of the world’s nicest Business and First Classes? By earning loads of miles, of course. Here are five easy ways you can earn more miles.

1. Collect More Credit Card Sign Up Bonuses

This is the easiest one, and where the vast majority of my miles come from. There are so many 40,000, 50,000, and even larger sign up bonuses available.

Many people worry about what the effect of opening credit cards will be on their credit score. There is an effect, so I recommend tracking your credit score over time to see that effect. I’ve found the effect on my score to be very small, so I open any card with a big bonus I think I can use. This gives me those mega-balances that let me travel in Lufthansa First Class or Cathay Pacific First Class while still leaving enough miles for economy awards that save me serious cash.

Check out the best travel credit card offers for December 2014 or a Free Credit Card Consultation to get started with collecting more sign up bonuses.

2. Category Bonuses

Many of the cards you have likely offer 2x, 3x, or 5x points on certain purchases. Memorize those categories or put small reminders physically on the cards, and carry all your credit cards–easier if you have a purse–to maximize every purchase.

If you figure you can get around 1.5x miles per dollar on all purchases if you maximize the category bonus on every swipe, and you spend $3,000 per month, this is an extra 18,000 miles per year compared to always getting 1x per dollar.

You’ll note that this is way smaller than even a single credit card sign up bonus, so focus there first and here second.

3. Retention Bonuses

I always cancel my credit cards by phone because I want to give the agent a chance to pitch me a bonus or bonuses for holding onto my credit cards. The bonuses might be:

  • A fixed number of miles: we’ll give you 5,000 miles to keep the card
  • Increased miles for spending on the card: we’ll give you 2 miles per dollar for the next three months
  • A waived annual fee: we’ll credit your account for $95 if you make five purchases on your card in the next month; that will offset the annual fee
  • Something else

Sometimes you can get a few offers and choose between them. I always listen carefully and decide whether the retention bonus makes keeping the card the smarter move.

You might even want to call in and ask about retention bonuses if you plan on holding your credit card. It never hurts to get free miles.

4. Refer Your Friends to Your Cards

There are frequently ways to get extra points by referring a friend to a card you have. We’ve seen that on the Starwood Preferred Guest cards, the Chase Freedom, and Chase Ink Plus among others.

You should always evangelize to your friends about miles to try to get them interested, so they can be your travel companions. (Forward them this post.) And when you can get bonus miles for referring them to a card that you believe would be valuable for them, jump at the chance.

5. Dining Programs

You can earn up to 8 miles per dollar at select restaurants if they are members of a dining program. You earn 5 miles per dollar by registering your card and dining frequently enough to earn status plus another 2-3 per dollar if you use a card with a category bonus at restaurants. I use the Citi ThankYou® Premier Rewards Card for its 3 ThankYou Points per dollar on dining and entertainment.

I wouldn’t bother eating at a restaurant just for the miles, but if your favorite restaurant is involved with a program and offers extra miles for every trip, sign up. Check here to see which restaurants are included with Rewards Network, which runs every airlines’ dining program.

But consider your time…

Balance all these ways to earn more miles against your time. We all have a finite amount of time, and sometimes there are better uses than squeezing out a few extra miles. Even I tend to save time and go for the lowest hanging fruit–credit card sign up bonuses–mostly.

Make sure to check out 4 Easy Ways to Spend Less Time on your Miles Hobby.

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