You can also grab sbotools from Slackbuilds.org, run the script and let it automanage your SBo packages.
Normally I run things like this:
Code:
sbosnap fetch
sboinstall {name of package}
You can run multiple instances of sbotools in case you want to add optional dependecies prior to compile time.
Over time you'll normally run:
Code:
sbocheck
sboupgrade {name of package(s)}
I honestly recommend sbotools a lot because it really complements Slackware, and helps keep software up to date as new versions of packages get rolled into Slackbuilds.org's repositories.
It may be very BSD-like, but then again Slackware is very UNIX-like.
Also to add to what was mentioned, make sure you run slackpkg this way:
Code:
slackpkg update
slackpkg update gpg
slackpkg install-new
slackpkg upgrade-all
slackpkg clean-system
Be careful with the last command if you haven't blacklisted the SBo packages, but use it because it can remove packages no longer used or considered unwise to keep.