There are no 'tricks' as such about transiting in India however nothing prepares you for the intensity of the first time experience. The noise ,the colours the smells (good and bad) and the huge numbers of people on the move. Toilets are not always clean and often smelly with paper often scarce and be careful of drinking unbottled water and don't be caught out by contaminated ice.
The airports that you mention are are efficient and well used to large numbers and many foreigners. Many people speak English and most are very helpful.....you should have no real problems.
However smaller airports are very often a totally different story and good contingency planning is essential.