i posted a few photos from the Shoot With Beckstead workshop on the OpenSourcePhoto forum and someone commented on wanting to get better black and white conversions like this one.
for those that may not realize, black and white conversions are actually really hard to nail down. so here's the image in reference and my steps in converting it. the before and after is posted above, and each individual step is below if you'd like to see more detail in the shot.
1) decide whether a black and white conversion will actually enhance the photo or do it more harm than good. so many times we just think "oh, i like black and white" with out stopping to question if the color in a photo is what makes it stand out to begin with. in this case, there was a huge mirror in the background (half behind the model facing out, and the other half facing the wall exposing the glue and blue backing). the blue is ligther than all the other tones in the photo and draws the eye away from the subject so it's time to "convert to grayscale" in adobe lightroom.
2) then adjust the exposure, black clipping and contrast sliders so the photo doesn't look so "muddy."
3) you'll notice that your eye can't focus on the subject so well, so to help recenter your eyes, add some vignette (the sliders are toward the bottom right corner in lightroom). see the darker corners in the fourth photo?
4) add a little bit of warmth to the photo using the shadow hue and saturation sliders. i chose an orange hue with just enough saturation to warm things up without it looking overdone. for this photo, it looked best to warm only the shadows. use highlight hue and saturation, and you'll get a sepia toned image.
5) in photoshop, get rid of any other distractions using the clone and healing stamps. this step took a long time, but was totally worth it! i also brought the contrast and brightness up in an adjustment layer. there are way more tricks in this step than i can explain here.
anyway, this should get you pointed in the right direction for converting to black and white. i used to use actions for this, but a single action can't work for every photo. lightroom is an incredibly easy way to give each photo the appropriate attention for this sort of conversion.
have fun!