on some drum forum i have read a cool trick that i think can also be used for practicin guitar

use your sequencer program, draw in a drum loop, and then delete every other quarter note, or every other measure...practice to it and see if you can still play with the correct timing :)

know what i mean?
lets say this is the drum loop ...( O=bd, X=sn)

OOXOOOXOOOXOOOXOOOXOOOX

then you erase parts so it would look like this

(....=silence)

OOXO....OOXO....OOXO....OXOO.... or even
OOXO........OOXO........OXOO.... and so on ....

i think this is a great way to practice/develop your "inner" metronome :)