My biggest curry cooking tip would be to slow cook curries whenever possible. You get lovely tender meat that just melts in the mouth, and you get a richer more authentic tasting sauce. Slow cooking also means you can use more economical cuts of meat, so it's budget friendly!
Slow cooking a curry is so easy too - you can prep your curry in a matter of minutes, then pop it in the oven or slow cooker and forget about it until dinner time! You can slow cook lamb curries for 2 hours in the oven or 8-10 hours in a slow cooker. And whilst you are at it, why not make double and freeze the rest for a super speedy meal next time?