I like to do weird lfo patterns and routing in synth, and not over using the same sounds helps otherwise you lose interest. Some strange things I've done.... Take a saw wave and use a reaaaalllly wonky lfo shape, throw it on the pitch of your sound, drench it (or not) in some reverb and if you can, automate your panning filtering and volume to make the sound more "animated". Ive done similar things with bass tones too. how about some beeps and blips with delay that move up and down the whole tone scale (very future aesthetic...) Chop a vocal sample, pitch it many octaves lower than it originally was in your sampler and play around with different pitches in that register, it'll sound long and drawn out, use a reasonable amount of reverb and have these different vocal drones sit at the bottom end (200 - 300 hz region) of your ambient mix. Literally just experiment, its crazy what cool and original things you can make if you think intuitively and creatively without any inhibitions.
