After ~6 years I'm getting back into playing for a local orchestra. I have until early September to get back in shape, so I think I'll be fine with regular practice. Currently I'd say I'm a passable player but not where I'd like to be.
Most pressing issues for me are
Endurance(i believe should just come with practice)
Smoothing out lip slurs
Getting a fuller sound in the lower range(will be on 4th)
Transposing
Any advice on exercises/études/books? Most of my resources are back at my childhood home so I need a restock.