What are some of the more favorable trade routes?
When you first begin the game on Hermes (nav 5), buy as much Brikcrete as you can. Take it to Anhur (nav 7) and sell it for about a 50% profit. At Anhur buy precious metals (Rhodium, Platinum, etc.) and bring them back to Hermes to sell for another 50% profit. Making a few runs like this should easily put you over 25,000 credits. You will then have the option to fly combat missions which tend to pay a bit better than trading. Later you may find yourself on Bex (nav 2). Buy the largest cargo ship you can and fill it with Bex Beer. You can take this almost anywhere and make a large profit. Also, read the news bulletins as often as possible. Several will clue you in to temporary increases or decreases in the price of certain goods. If a news bulletin mentions a shortage of a certain item on a certain planet, buy up that item and take it to the planet. Be sure and hurry, the price changes are only temporary.