There are alot of ID templates available online (just google, posting methods for fake ID's is even sketchier than posting about herbals, imo.
Anyway, if you have or no someone with a photo printer, you can print the template, cut it out, (usually they have a front and back template, dunno about the mag strip though, i doubt its scannable...) then use an old card (i used a school ID), strip it, mount your new card face and back, mount picture*, and laminate... for the most part, look for liquor stores with younger people working, and don't act sketchy. I'd say that 95% of the time they will not scan it, and if they see it is fake they will either keep it, or give it back and tell ya to get lost.
About the picture: use a decent digital camera, try to match the size and proportions of an actual ID pic (same size, same framing, etc). Also its a good idea to use a sheet or plastic in the background...
Sorry... 1 more thing about ID's, they usually have a hologram imbedded... there is not a good way to replicate this, at least in my experience, other than finding someone who has an old ID, and using that IDs backing for the strip... but like i said, it is a BITCH to try and replicate that.
The method above is how we used to make IDs when I was in high school... i know in my state they have new IDs, and they may be harder to do. ONe of the best and easiest ways to get an ID is to get an older sibling to "lose" their ID.... they can get a new one (give em cash for the $15-30 dollar charge) and you can keep the old one, with a picture of someone who closely resembles you... (i assume)... Its even better if you have a sibling who just turned 21, cus the old ID is usually setup different to indicate a minor... once you're 21 tho, if you don't get a new ID, the old one is valid ID... just say you haven't gotten around to changing your ID...
Maybe you can use this, maybe not... try it tho, it never hurts (and if your ID making game is strong, you can make some side loot, although just a warning: at least here in the states, producing and distributing fake IDs is a felony, with actual felony repercussions... so be careful.