After the public exhibition of gross incompetence by the Indian government and ISPs alike, it is in everybody's interest to know how to bypass these ridiculous blanket bans.
The following is a general guide that will ideally allow you to visit said blocked sites. If you have any questions or comments, please use the fora.
It is recommended that you use Firefox to follow any steps outlined below. However, it should be reasonably straightforward to adapt them to other browsers as well.
What is a proxy?
A proxy (server) to put it simply, acts like a middleman and retrieves web pages on your behalf. For e.g. since the GOI and incompetent techs at ISPs all over India have decided to block blogs like mumbaihelp on blogspot, instead of asking your browser to retrieve the mumbaihelp page, you can ask your browser to ask the middleman (proxy) to get it for you. So, for all essential purposes, you are only accessing the middleman (who has not been censored) and not mumbaihelp.