why don't you try to play along with a cd?
this way you can practice your tempo at the same time enjoy playing along with your favorite tracks. same effect as a metronome kasi perfect time naman yung mga albums like a metronome. unless you have a really bad cd na hindi na inayos before nirelease sa market.
try mo yung fall out boy's "sugar we're going down"
another advantage to this is mate-train mo yung sarili mong makinig ng drum tracks at pag aralan kung papano yun nabuo or, in some cases, "dinaya"... example: Greenday's American Idiot. yung drums nun ay hindi live drumming... it's just a looped drum track. I guess even trey cool is guilty of wobbly drumming kaya siguro pinalitan ng producer iyon ng sample na drum track nya at niloop na lang using a software.
speaking of software, you can use that to replace your metronome. try to get cakewalk or sony acid pro and get sample track na gusto mong praktisin... you can loop it endlessly and play along with it as long as you want. if you are really particular, you can even compare the sound waves side by side para alam mo visually kung gano ka kalayo sa iyong sample.
hope this helps!