Definitely split it up into files. I suggest along the lines of features. Using e-comm as an example you could have Account, Catalog and Checkout PSDs.
I'm using Sketch now because of it's pages and artboards features. I find them far more friendly to work with then layer comps or stacked views in PS. I've gone both ways in PS but if I gave it another go I'd probably do what I do now in Sketch and lay out an entire workflow (2, 3, 4 screens).
I now treat these workflows like skinned wireframes and don't exactly fret the details like pixel perfection. I've got a separate file that's my style guide and cut sheet and that's broken down into those same sections mentioned above: Account, Catalog, Checkout and additionally, Generic for things like ActionBar assets that are used across all areas.
Use a plugin like Cut&Slice to export your assets. It can scale and export Android assets automatically or you could design each individually and export those. In any case, HUGE time-saver.
As far as versioning goes we've got Dropbox and dropping old copies in an _archive folder is about the extent of it.
Let me know if I didn't answer anything specific you're looking for. I've been designing for iOS and Android over the past couple of years and changing up (and hopefully improving) my process and tools with each project.
Definitely split it up into files. I suggest along the lines of features. Using e-comm as an example you could have Account, Catalog and Checkout PSDs.
I'm using Sketch now because of it's pages and artboards features. I find them far more friendly to work with then layer comps or stacked views in PS. I've gone both ways in PS but if I gave it another go I'd probably do what I do now in Sketch and lay out an entire workflow (2, 3, 4 screens).
I now treat these workflows like skinned wireframes and don't exactly fret the details like pixel perfection. I've got a separate file that's my style guide and cut sheet and that's broken down into those same sections mentioned above: Account, Catalog, Checkout and additionally, Generic for things like ActionBar assets that are used across all areas.
Use a plugin like Cut&Slice to export your assets. It can scale and export Android assets automatically or you could design each individually and export those. In any case, HUGE time-saver.
As far as versioning goes we've got Dropbox and dropping old copies in an _archive folder is about the extent of it.
Let me know if I didn't answer anything specific you're looking for. I've been designing for iOS and Android over the past couple of years and changing up (and hopefully improving) my process and tools with each project.