A tip for collecting BIO: when you have fast or tough moving creatures on a world (usually worth the most BIO), move to the upper or lower edge of the map, and cut off their mobility by half. Stay along the edge, and they'll have mostly linear movements, making them that much easier to outrun and/or shoot.
After you get better tech for your lander, this method makes them trivial to deal with.
Oh yeah, and you missed out on some really shiny worlds (some of the best in the game) in Alpha Centauri, definitely worthy of losing a few crew to immolation and boiling, and would be a massive boon to your resources. Definitely a reward proportional to the risk.
EDIT:
Oh, and a tip on mining/hunting: the meters cap off at 50 points of ores/BIO. Keep that in mind, and there's no rollover either. Even if you have 5-10 space left, I suggest if there's even a small handful of ores/BIO leftover on the field, it's more profitable to jump out, and then return for the rest. Especially for anything more valuable than BASE ores and a cluster of BIO canisters that had creatures that yield a crap-ton of BIO. There are creatures that give up to 10, 15, and even 20 BIO individually. Don't let them go to waste. Same applies to some really hot worlds, even though the ores appear timny, some can yield between 15-25 units, although they don't appear to do so (most commonly found in COMmon elements, or PREcious elements where there are many of the (Auric, metal, and treasure worlds, and the rare shattered world).
Oh yeah, and this early in the game, I suggest you build up your mining skills (learn to shoot and dodge with a lander, since you'll be doing this a whole lot), and load up with tons of storage units, and a supply of at least 4 landers. For a good month or two (more like 3-4 months, really) of having up to 8 storage units, 2 fuel tanks (100 fuel) and 2 crew pods (100 crew, for mining and defense meatshields for escaping battles), I managed to build my ship into one hell of a mining craft, draining our quadrant of the galaxy of resources in that time. Hayes was shocked with the catch I brought in regularly.
I think, one time, I had 12 storage (6000 ores), and the rest were fuel and crew, and just spent a few months nomming up every pellet of ore like Pac-Man (a majority of them being BASE (3000+ BASE ores), and a significant amount of RARE, 500+ PREcious, a rad amount of RADs (300+), and at least a hundred or so EXOs). Hayes nearly shat a brick at the RU profit that was made. Calculating it all, I think I made upwards to 27,500+ RU in a single trip, all profit.
Needless to say, the caterpillar was full, and was then slowly metamorphosing into a pretty kickass battleship.