Metronome

Any quartz, battery powered metronome will work fine.  Make sure that it is loud enough
to be heard while playing. The Dr. Beat is highly recommended, although it is a bit pricey -
sounds subdivisions, etc.

Mutes - priority order, these don't need to be purchased all at once.  As you become more
        advanced as a player, the literature may require more specialized mutes.

    Straight
        A metal (aluminum) straight mute is required.  Recommended brands: Jo-Ral, Tom Crown,
        Denis Wick.  You'll find various metals on the bottom - aluminum, copper, brass - all have
        slightly different sounds.  Start with aluminum, then experiment as necessary.  Yamaha and
        Bach are making metal mutes as well.  Humes & Berg have some pretty good
        metal mutes - don't buy the fiber (red and white) mute for everyday use - it's use is for
        special effects only.

    Cup
        Denis Wick, TrumCor, Jo-Ral, Humes & Berg.  Make sure the cup fits your bell size and that there is
        complete access to all ranges.

    Harmon
        Jo-Ral, Denis Wick.  These start to get pretty expensive, but will become necessary for
        some advanced literature.

    Practice/Whisper
        Denis Wick, Humes & Berg, TrumCor, Yamaha Silent Brass.  These are special use mutes only.  Do not
        plan on doing the bulk of your practice in a dorm room with a practice mute.

    Other
        Plunger (any store), SoloTone, Pixie, Bucket, hat
 

Lubricants/Cleansers - the best way to ensure that your instrument plays its best and lasts for
        many years, is to keep it clean and lubricated

    Slide - Slide-O-Mix, Trombotine.  Keep your slide clean and lubricated.
    Valves - depending on the type of valve (rotor, Thayer etc.) some oils work better than
          others - discuss it with me.  Keep your valves clean and lubricated.
    Tuning Slide - Leblanc, Dow Corning high vacuum grease
    Other - Cleaning rod (never use the cleaning rod on the inside of the inner slides - use it for
        the hand-slide only), Flexible snake (for inner slide cleaning), mouthpiece brush (keep your
        mouthpiece clean, a daily rinse is best), soft rag
 

Miscellaneous

    Tuner - Many brands and price ranges are available.  Like all electronic technology, tuners are
        in a state of constant improvement.  Currently, I recommend the Korg CA-30.  It's small,
        inexpensive and quite accurate over the ranges.  A tuner is a very valuable practice tool for the
        student (and professional) trombonist.

    Recorder (the electronic device, not the instrument) - Again, a very valuable tool for
        improvement - a very unbiased set of "ears."  Currently, minidisk technology is my
        recommendation.  For about $300, you can get a very high quality recording device
        with a great microphone (Sony).  Recently,  portable WAV/MP3 recorders have come
        on the market.  The Edirol R-9 is an example - built-in microphones,  records to flash
        card, USB to computers, playback through stereo systems or headphones.  In lieu of
        that, any portable recorder will allow you to listen back for many aspects of playing -
        time, intonation, attacks, etc.

    Trombone Stand - UMI, K&M, Hamilton - I don't recommend the trombone stands that fold up
         to fit in the bell for storage.  They tend to be less secure.

    Other - wire music stand, gig bag, locker,Wenger practice room