Three must haves for the Sailor's toolkit are Boeshield T9, McLube SailKote and LanoCote.
Boeshield T9 is a great water displacing light lubricant that also protects metals from corrosion. I spray my tool boxes and their contents with T9 regularly to help protect the tools from corroding.
SailKote is the best dry film lubricant I've found and is good for coating sail tracks, genoa tracks, sail slugs, roller furling foils and many other items on a sailboat that need to slide or move freely, but you don't want to collect dirt. Unlike Boeshield T9, McLube SailKote won't attract dirt at all, and dries to a thin, almost invisible film. I use SailKote once a season or so on the mast mainsail track, genoa tracks, mainsheet traveler, and roller furling foil.
LanoCote is a paste that is made from anhydrous lanolin and works well as a galvanic isolation compound between aluminum and stainless steel. It also works quite well as an anti-galling/anti-siezing compound for use on stainless steel to stainless steel contact. The one downside to the stuff is it looks like baby cack...
When commissioning my boat in the spring, I use LanoCote on all the screw-pin shackles on the boat, as well as most of the bimini/dodger fittings so I can be sure to take them apart at the end of the season.
BTW, The Seafit Miracle cloth is one product that most Sailnetters and Practical Sailor agree on.