A blog I dislike recently had an article about "useless slights", basically they felt that any slight that you don't have an effect for is a waste of time. Now I can see how for a beginner focusing on amassing slights over effects could be just as bad as trying to buy up all the secrets. I may be biased as I use slight of hand as physical therapy for my damaged hand but I think the more slights one can do the better. Sometimes content creators just expext you to know a certain type of slight, look at the effect I just reviewed from Danial Madison. They basically expected you to know how to locate a named card and pass it to the bottom of a deck. Or sometime you just can't do a certain sleight and you need to find a work around. As I just mentioned I have a damaged hand and part of that damage means I can't classic palm a coin. It's not a matter of practice there is scar tissue in key areas that makes it impossible and this is something I have to work around all the time in my coin practice and I get around it by knowing other slights or doing it left handed. Every sleight you can do gives you potential whether or not you have an effect that needs that slight.