-Slipped in railroad tracks.

always cross them at a 90〫angle. T

-fell over at 0mph when stuck in toe clips several times.

how about clipless pedals and shoes? there's a learning curve there, too, but overall a more manageable pedal attachment system.

- been T-boned by a taxi at 5mph when I ran a red light (it came out of a blind spot.. but that's no excuse).

well, you could stop running reds but if you choose to run a red be prepared for the consequences- running a red requires super vigilance.

- slipped on black ice my first day of bike commuting ever.

studded tires in winter will help with this. If not, you've got to pay close attention when the temperature drops below freezing. It seems with this crash, like most of your others, you're not concentrating. These kinds of accidents all belie lapses in attention. Snap to attention, keep your head up, your eyes ahead of you on the road so you can anticipate problems. Are you riding with headphones? If so, you might want to go without for a while until you get more disciplined in your concentration.

- got blown over by a gust of wind when riding no handed.

I think it's a good idea to occasionally ride no handed in order to improve bike handling skills. But choose when you do it carefully. Days with strong winds are not the best choice.

- and now... crashed from a pothole/rut during the rain.

sometimes completely unavoidable but, as you say, the sunglasses may have made your vision less than perfect. Best to treat each puddle as a potential pothole.

Good luck with your riding, take care and don't be discouraged. Your crashes seem to be the result of the fact that as a relatively new rider you are riding a good amount of miles, which means you will get faster before you get "smarter" as a cyclist. This sometimes happens to people who've gotten strong in spinning classes and have little road experience. Then they are out and on the road and they have some pretty random crashes that other newbies might not.