Where can I find more information on Trade and Investment in Trinidad and Tobago?

The most useful websites include:
Ministry of Trade and Industry
Evolving Technologies

Each sector targeted for investment has a separate company charged with developing that sector.

What are the most direct travel routes to Trinidad and Tobago?

Because of distance there is no direct flight to Trinidad and Tobago. From Asia one must transit through a third country. From India and other Indian sub-continent countries the most direct flights are as follows:

Delhi/Mumbai/Dhaka/Colombo – London – Port of Spain
Delhi/Mumbai/Dhaka/Colombo – London – Scarborough (weekly flight)
Delhi/Mumbai/Dhaka/Colombo – Frankfurt – Scarborough (weekly flight)
Delhi/Mumbai/Dhaka/Colombo – New York – Port of Spain.

What universities are there in Trinidad and Tobago?

There are two major universities: The University of the West Indies and The University of Trinidad and Tobago. In addition there are numerous private institutions offering external study programmes from USA- and UK-based tertiary institutions.

See About TnTStudying in TnT section of this website.