Checking spoke tension without specialized tools I have laced and trued my first wheel (YAY!) at home, while in the fork. It is fairly true (to the point I used to pay money for), but I am not sure if the spokes are tensioned properly (I guess it is possible to have ill-tensioned wheel which is true). How to check that? Also, if the spokes are tensioned OK on the whole, how to check if individual ones are off? Squeezing by hand doesn't show any noticeably looser ones.
On a standard front wheel all spokes (both left and right) should (in theory) make the same musical note when plucked. A rear wheel is 'dished' to make room for the cassette. The non-drive side spokes will be at a lower tension (and pitch) than the cassette side.
If you can find a bike with the same spokes and lacing pattern use that as a guide. If not, any newish bike can be used.
Too much tension will damage the rim at the eyelets, whereas broken spokes are a sign of under-tensioning.