Its really simple to do online transactions for paying bills of telephone, electricity and so on. Also its really easy to recharge your phone or book tickets for theatres. There are also facilities to book KSRTC and private bus tickets. Here are the links to those site. This is a one stop site for online transactions.
And the doubts which we have and what i had are the security and the procedures, but when i actually started using these i am now at real ease that i hardly need to move around. I can now do almost anything from home.
Its really secure and we even get the amount credited back into our accounts if there are any failures from them during transactions.
To make you more secure i have given below the official websites:
Prepaid mobile phone recharges
DOCOMO : http://www.tatadocomo.com/online-recharge.aspx
AIRTEL : http://www.airtel.in/m-commerce/recharge-prepaid.html
RELIANCE : http://www.rcom.co.in/Rcom/personal/prepaid/cdmaRechargeVoucher.html
IDEA : https://care.ideacellular.com/wps/portal/PrepaidInstantRecharge?rechargeType=OL
VODAFONE : http://www.vodafone.in/online_prepaid_recharge/online_recharge_mobile.aspx
For traveling in India:
Bus ticket reservation
Kerala State Tansport Service ( KSRTC) : http://210.212.239.117:8080/KsrtcOnlineR/
Karnataka State Tansport Service ( KSRTC) : http://59.162.166.116/AWATAROnline/
Train ticket booking
Indian Railway : https://www.irctc.co.in/beta_htmls/eticketguides.html