The 1,000 bonus SkyMiles for every round-trip I book at www.delta.com (500 bonus SkyMiles per one-way trip) was incentive enough for me to rarely ever call for a reservation unless absolutely necessary.

I have been taking advantage of this ongoing bonus since it was first introduced by Delta Air Lines.

Perhaps Delta Air Lines should further investigate temporarily boosting the incentive for a limited time — perhaps 2,000 bonus SkyMiles per round trip booked at www.delta.com — and include it in their advertising to get the word out, as well as use other means of spreading the word, such as on the screens in the kiosks...

Additionally, further improving www.delta.com to include more functions and features would further eliminate the need to call an 800 number.