Recently we matted about 40 prints and framed 20. It was amazing to see how much better a print looks if it is ready for final presentation.
What kind of mats you select is up to your taste but we would think some white fits better to galleries. Some chose think museum quality mats while other (like ourselves ) stay with normal mats.
If you care about archival prints it should be clear that also all your mats, glue and foam board have to be archival too (acid free).
Finally the matted photo get attached to a foam board (acid free again) and framed or protected in a clear bag ready for display.
Essential reading:
Alain Briot: "Matting"
13.2 Stretching
If you print your photos on cavas (see printing) then you might consider to let your canvas get stretched on frames .
13.3 Framing
As all of these subject framing is an endless story by itself. We use metal frames for display but ultimately want our buyers to decide about the frame they like.
13.4 Storage
Once you have some ready prints (larget format) and also lots of bags with matted images you need storage. We got us a 10 drawer flat file and it will be full sooner than later.
Storing the framed images is another issue you need to deal with.
13.5 Shipping
We would have missed this section without Alain Briot's fine article about "Shipping Photographs ". This is the kind of practical help we fine art photographers long for.