• Denoise (Edit > Noise Reduction / Restoration > Noise Reduction (process) or cmd/ctr+shift+p)
• Cut at zero-crossing (Edit > Zero Crossings > Adjust Selection Inward (Shift+i) or Adjust Selection Outward (Shift+o))
• (Convert to mono (Edit > Convert Sample Type or: shift+T))
• Normalize to -2db (Effects > Amplitude and Compression > Normalize (process))
• fade-in / fade-out if abrupt start or end of sound

Further options

• Edit individual sample points (via HUD)
• Leveling
• AMP (amplifier) envelopes
• Filtering (high-pass, low-pass, bandpass), equalizing
• File formats, sample rate / bitrate set
• File management: naming, export multiple

File formats / Save

• Formats: Uncompressed (PCM, eg in aiff or wav container), lossless (eg in flac, apple & wma lossless) / lossy Compressed (eg as mp3, ogg, wma, mp4)
• Sample rates: 8 - 192khz 

Tips for naming files

For a soundlibrary, terms make sense that characterize the sound in general, eg. according to material and "morphology" of the sound. So you can find the sounds again. Examples:

• “beer_can_metal_impact_sharp_long_resonance”
• “fingernails_scratching_wood_dull”
• “small_tonal_ding_glass_repeated”

If you have a concrete, known process, e.g. a coffee machine or a kitchen blender, etc. then it is worth saving the whole noise under this name, and adding any qualities (eg coffe_maker_steamy_sharp_hiss ")

If you have a sound that is (kind of) similar to the sound of a motor or something else concrete, so where a "purpose" is audible, then that could also be in the name, but not only.

Sometimes it makes sense to make a note about the recording technique, especially when creating variants, eg:

• _closeup
• _distant
• _stereo
• _….