Cheech,
I've found in the past that using a really bright light tends to spook them. Using a soft, dull light tends to bring them in a bit more.
Also, at your local tackle shop or servo that sells fishing gear, get yourself a few packets of those little chemical snap lights. They have a wee little piece of plastic tubing that goes over the end of the light stick quite nicely. The aim of the exercise is the thread your line through the tube, then push the light stick into the tube to get a nice snug fit...thus pinching your line in there. Hope that makes sense.
Set that up about 20cm above where your jig is tied on. This also helps to attract them.
Yes, weed beds are the go. I've found best results in places where there is a channel with edges that have weed. Casting along the channel edge worked quite nicely. However, anywhere where there's weed cover should work. I also found just cast and retrieve with a few jigs and twitches in between. Then yes, as you said...keep the pressure on when you feel the weight.
Hope this helps.
Ben