- Python. So much power, in so little code, and very intuitive for an ex-C programmer. If you don't already know it, learn it now.
- Bootstrap. Hell, I don't care if my prototypes all look like Twitter if they look as good as this - it's a lot better than I will design myself and it's all there on a plate!
- Stack Overflow. If you're new to the planet and haven't heard of SO: when you're Googling for the answer to a programming question, pick the responses from Stack Overflow and you won't go far wrong. There's surprisingly little dross here and a lot of very authoritative knowledge.
And as a bonus to exercise your brain, take one of the free courses at Coursera. I'm about 2/3 through Stanford Algorithms I, and loving it. Just about enough reminders of all the maths that I've forgotten since university, it goes along at a decent pace, and it's only 5 weeks long so it's not like signing up for a life sentence. (Oh, and did I mention that it's free?!)
So what am I writing with all this code? I've made a few changes on Tank Top TV, but I'm currently focussing on a great idea for a social media tool that I hope to be able to share more widely in a matter of a few weeks - watch this space!