Problem: 
    My head is filled with more ideas than I can fit into the time in have freely available. 
    Ideas come unplanned and often in bursts. 
    When they are fresh my enthuisiasm is high, and I start something in hope of gaining momementum. 
    But since few worthwhile things can be fitted into a single short session, but many of them  are in progress. 

Limiting WIP
    The adherents of the Kanban philosophy consider work-in-progress as a source of waste which should be avoided. 
    But that philosophy comes out of the context of manufacturing. 
    There work-in-progress means having physical goods / inventory which is bound/dead capital. 
    In my opinion, this analogy doesn't translate one-to-one to intellectual or creative tasks. 
    Especially in the private life, personal learning and creative acts don't need to be subjected to bean counting & book keeping. 
    Thoughts and ideas, even if they are in a draft stage, do have a value on their own. 
    They are necessary parts of a process, and the residue of it. 
   The learning that takes place, the joy that can be felt while doing something might already constitute an end in itself.

Embracing WIP
    Therefore I think work-in-progress should be embraced. 
    Rome was not built in a day and few great works (not including performative acts of course) can be done in a single session. 
    If the strict limit to new work in progress hinders you starting something that is the real waste.

Further considerations
    Maybe unfinished works should not pop up in a stream. 
    Feeds are not so good for updated content. 
    Add indicators:  When was it started /Last tended to / number of updates
    Version history /  Keeping old versions around?
    Remove/Mark out of date stuff
    It's ok to abandon stuff.  Might be waste, but some things are dead ends. Be protective of your time