#2
Go up and down the strings using the whole 1-2-3-4 thing
there are a load of variations, but they're easy to work out
1-2-3-4
1-2-4-3
1-3-2-4
1-3-4-2 etc.
Start on different fingers as well, some of them are hard to get a grip on but you'll feel a serious difference just going slow on them

And practise unusual chords, 7ths and upwards, always helps
#3
here's one

E-|-------5-------8-------7-------6-------8-------5-------6-------7-|  
B-|-----6-------5-------8-------7-------7-------8-------5-------6---|   
G-|---7-------6-------5-------8-------6-------7-------8-------5-----|  
D-|-8-------7-------6-------5-------5-------6-------7-------8-------|  
A-|-----------------------------------------------------------------|  
E-|-----------------------------------------------------------------| 

E-|-5-------6-------7-------8-------8-------7-------6-------5-------|  
B-|---6-------7-------8-------5-------7-------6-------5-------8-----|   
G-|-----7-------8-------5-------6-------6-------5-------8-------7---|  
D-|-------8-------5-------6-------7-------5-------8-------7-------6-|  
A-|-----------------------------------------------------------------|  
E-|-----------------------------------------------------------------| 
#5
FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU



This video demonstrates some exercises and the way to practise to develop good independence - www.youtube.com/watch?v=CvhZ80OsuTQ

You can actually practise finger independence doing anything - it's about developing control. Obviously, stuff using all 4 fingers is better, but you can just learn whatever you want as long as you're practising it correctly.