Those are all great tips!
I love mixing and matching pattern pieces...if you have a basic dress that fits well, you can add different sleeves or necklines pretty easily (I learned from experience and also a few good books!)...also, vintage patterns made in modern fabrics gives you a longer life for the pattern!
Thrift stores are a good source for a lot of sewing notions if you are willing to spend a bit of time...I like to snip out the labels as well to use in altered art pieces...and the buttons can be used for charms and not just sewing...
if you are ever at a social gathering with elderly people, sometimes if you mention that you sew, a lot of them have old sewing items that they no longer want! Just recently, I was offered a vintage treadle sewing machine and table and all of the sewing items inside! I am going to pick it up this weekend! So, talk about your passion...another person who was once passionate about sewing might be listening!