To induce newness in system and for earning extra revenue through philately, Department of Posts should traditionally issue an altogether new definitive series of postal-stamps and postal-stationary simultaneously in all denominations every year on first day of new financial year which should also be date of revision of postal-tariffs if any. However, colour of a particular denomination of a postal-stamp of definitive series should be same but with change in design on basis of theme selected for that year. A representative of main opposition party should be traditionally included in the advisory-body to decide on issue of new postal-stamps to avoid any political bias in choosing personalities to be figured on postal-stamps.
To popularise postal-services over private couriers and for enormous extra revenue-earnings, Postal Department should issue stamps with advertisements of sponsors by charging cost of advertisement for each printed stamp with pre-condition to purchase some minimum fixed percentage of total print-order. Advertisers will then use their advertised stamps preferring postal-service over private courier-service. It will not be some new policy because Department of Posts already prints advertisement from private parties on postal-stationery.
(The views expressed by the author in the article are his/her own.)