Writing music at a fast pace can do a lot for developing your chops, I think, but rarely does anything for you in terms of quality.

When you have spare time, and feel like it, work on music. If it becomes a chore for you, it shows in the music.. so work when inspired. If you're not inspired, work on getting inspired.

If you even think working on getting inspired is a chore, take it easy. Then you are probably stressed out and overworked..

One great song will take you over the rainbow, one real person can take you there.. 500 mediocre songs, with 100 publishers buttering your ears for their own intrest, won't..