good to see you're getting back in the groove.
i can really just give the basic shpiel for improving speed: start slow and get faster. but there's not whole lot else to say now is there? repetition and gradual acceleration is really the only medicine for slowness. i suggest going to the guitartricks home and going to metal and finding some good speed exercises (i've found some very helpful ones). i think you can also search for speed at the homepage too. i hope that the exercises, with gradual speed increase and repetition, help you to get a lot faster. it's been working for me the last month when i started using all three.
Thanks for listening to this small piece of me.