Personally, I am usually motivated by working in a conducive environment, where all my needs are being attended to. This usually motivates me to give my best in any technical or challenging work giving to me.
My motivation also comes from my colleagues at work. Any time I mingle with experts form diverse background, it get me motivated.
In a situation where I need to participate in a task force work, once there is clear and precise instruction, given for the job, I usually get motivated, in other words, my motivation has to do with my superior given instructions that are not ambiguous motivate me a lot in order to deliver or give my very best.