This is my first try at Reaper and I'm still experimenting with different options regarding workflow.
So this is what I did:
Recorded 12 songs and mixed them with an 'idea of what mastering will sound like' fx chain (tape-emu, eq and comp/limiting) on the master buss. Most of the time I had these master-buss plugins disabled and only enabled them at the end-stages of the mixing process.
Then I exported the songs in wav format, with the master-buss fx disabled, opened up a new 'Album' project and imported the wav files to individual tracks. I adjusted the file lengths and did some fade in, fade outs and moved the files around to get the right track sequence and length between tracks....in essence, creating the full album.
Then I created regions for each song, naming and numbering them as it would appear on the playlist of say, Foobar or Winamp. What I also did was to snap the begining and end of each region to the timecode. With the regions set up properly, you can export the tracks using the render-per-region (or something like that) function and using wildcards to name and number the tracks automatically.
Finally (where I am now) was to recreate the 'mastering fx chain' again. I did this by inserting the EQ, Comp and limiter on every track, with the VU- meter and tape emu on the master-buss. The VU, I use to track the volume of each track, while the Tape-Emu acts as a soft limiter to keep the whole project more cohesive and even in volume.
Like I said, I'm still experimenting and I might change a few things around.
https://soundcloud.com/tas-vol-nardus