I am curious, how often should I practice my card sleight of hand? Every day? 5 days out of the week? Any tips or advice?
Studies have shown that the best practice is concentrated practice for generally shorter periods of time. For instance, pick up a deck of cards and spend 10-15 minutes working on a particular move, etc. and then change to something else. There appears to be a kind of optimum time frame for gaining the right amount of muscle memory, etc.
As for me, I find that I gain progress by practicing in short intervals and regaling in long periods of idleness, sometimes up to several weeks. If a particular sleight becomes a stumbling block, I drop it and attempt practicing it later.
Make sure you are practicing the sleights correctly or it will be harder to unlearn the mistakes later. Remember that "Perfect practice makes perfect".