[kamocat]

The easiest way to learn any programming language (especially Labview) is to choose something you want to create for practice, and then attempt to build it. If you have $70.00 to spare, "Labview for everyone" covers most of the generic things you'll need to do. It really does go slow enough for anyone to follow along; if you're used to programming, you should be able to just skim through.

One of the most important and most useful things is the polymorphism (Labview handles most datatype conversion for you). Also, there's a lot of stuff hidden away in Mathematics, especially in the subpallettes of the "numeric" subpallette. Because of these two things, I found a lot of my origional subVIs weren't actually neccessary. If you have data in a cluster or array, remember that you can perform math on the array or cluster as a whole, instead of having to perform it individually to each item. Autoindexing (in both FOR and WHILE loops) is your next best friend.
Unless you find them to be unuseful and in-the-way, always have the context help and tool pallette visible.