Tony,
If you can bait up the night before, do it. It makes all the difference.
You dont specify what type of lake you are fishing, but on smaller waters i tend to bait up with dynamite halibut groundbait, crushed hemp, 2-4mm pellets, red maggotsand a tin of corn, then as John says, fish a float over the top with corn on the hook. If there are lily pads, they are usually a good place to try, as are the margins by reed etc. If you have lillies in the margins, that is where I would start.
Something else worth thinking about is tench tend to take smaller baits as the sun comes up, so maybe try amaggotas the sun climbs higher.
Fish with your bait on well on't bottom. I tend to use drennen stillwater blues for close in work with a no 8/ 6 shotsitting just off the bottom, then as a tench takes the bait your float will rise slightly. STRIKE STRAIGHT AWAY. If you need to fish further out, use a drennan drift beater, with a similar shotting patters. I prefer to floatfish like this as I dont need to keep the line tight , like you have to with the lift method. I think the thing to remember is sensitivity, as tench can give the tiniest of indications sometimes.
Hope this helps and have a good day, not much beats tenching at this time of year!!!!
Regards
Marcus