Some tips when you're not "inspired".
You won't always wake up every day with a brilliant song in your head, most of time you'll have to work hard to get somewhere. These are some methods you can use.
- JAM!
Very obvious but jam until you bleed if necessary. Sometimes you'll get something right away, sometimes this will take hours and even sometimes you won't have a thing.Be ruthless with your ideas, keep only those with value and work with them until you feel you have "something".
Try different approaches of the same thing(different rhythm, extra/less notes for example) to ensure you're not missing a better idea.
Make sure you're in mood to play, otherwise everything will sound "meh"(This happens way too often).