You will need a Soldering Iron and Solder.

Your soldering iron should be the "pencil" type
between 15watts and 45watts.  25watts is
probably the best for this application.  More than
45watts is too much.  It may damage some of the
components.  Especially germanium transistors.  
Do not use the "gun" type soldering irons.  They
are too powerful.  IMHO, if you don't already have
a soldering iron, Radio Shack soldering irons are
the most bang for the buck.  They work just as
well as the more expensive brands like Weller,
but will only cost you about $8.

The solder should be light-duty rosin-core lead
solder.  The smallest spool you can find will be
more than enough for several pedals.  Do not get
silver bead solder and make sure you get
"rosin-core".  Plain lead solder requires flux in
order to stick.  The rosin-core solder just makes
things a whole lot easier.

You will definitely need a pair of small wire
clippers.  A pair of wire 24AWG strippers is also
a big help, but not necessary.  You can strip the
wires with your clippers, but it's more work.

You will also need a 1/2" wrench for the jacks,
14mm wrench for the footswitch, and a 11mm for
the potentiometers.  If you don't have these, a
crescent wrench will work or even a pair of pliers,
but they might scratch your enclosure.

You will also need a small Phillips screwdriver to
close the enclosure, and a very small flat head to
tighten the knobs.