The best music I've done was made by forcing myself to work on things in a loosely structured way. Improvisation. Forcing myself to randomly pick sound-making things, pick a preset that isn't awful, and use it rapidly, before i have a chance to stop myself. I'm especially effective with actual physical instruments like wooden flute, electric guitar, and a mandolin, which is weird, since I'm not remotely an instrumentalist.
I seem to love the gadgets and software but am more immediate with the real stuff (which gets processed via plugins and sometimes hardware effects units), and immediacy is what I need most before I can shut myself down. The mistake I continue to make is in improvising on preset exploration and not recording anything.
The essential task for me is exerting self discipline: forcing myself to use my equipment at all (learning tools and playing with their sounds, instead of sitting around wasting my life away doing nothing but thinking about gadgets and watching TV or doing useless Internet stuff on forums
I have a self-censorship problem and a lack of freedom for the "impulse to create". Though it's certainly easy to not censor my posting of rambling nonsense on the Internet... I'm quite comfortable massaging existing material I've already made, so it's important to fool myself into having more pre-existing material... by creating it.