Well, it is a bit vague of a request, but here's a few things to digest (I suggest a few hrs and a big cup o' tea!):
1) Spend some time reading the build threads in our very own Luthier's Corner:
Luthier's Corner - TalkBass Forums
Lot's of great discussion with pictorials on how folks are actually making basses.
2) For more detail on the above, see the sticky thread on "How to..." at the top of that forum:
New "How to" section
3) And finally, once you've gotten some basics on construction, don't be afraid to read a little on setups (to make sure your bass is playing at its best):
ALL BASIC SETUP QUESTIONS ANSWERED HERE
I like the Fender guide myself...
Good luck!