Agreed with a lot that has already been said.
I've found that most of the barrier between making music and hitting a block is actually sitting down, opening the DAW, and just doing something, anything. If you don't focus too hard on progress and just do anything (someone recommended routine sound design or something, that's a good idea). However, it's important to do it each and every day, even if it is only for an hour.
That is, unless you're Eric Prydz. Then you can go ahead and work whenever you damn well please.