Traveling from Guildford to Coventry Need best way?

I will be traveling in June and need the best way to do this trip with luggage. I also need from Coventry to Heathrow. Thanks. PLEASE NO WEB SITES I CAN DO THEM MYSELF.

Guildford to Coventry: 1. SWT train to London Waterloo.
2. Underground Northern Line Waterloo to Euston.3. Virgin Trains Euston to Coventry. It will take about 2 hours 30 minutes including changes and waiting times. Through tickets are available including all 3 legs of the journey.
Coventry to Heathrow. 1. Virgin train to Watford Junction
2. Virgin rail to air link bus Watford Junction Station to Heathrow. A slight problem if you have luggage is that the bus link from Watford serves Heathrow Central Bus Station
not each terminal. From the central bus station you can easily walk to terminals 1,2 and 3 with your luggage on a trolley, but departures from 4 or 5 will require you to board the train or Underground from the bus station.

National Express (coach)

http://www.transportdirect.info/TransportDirect/en/Home.htm