Let me first add that I do standing overhead presses in place of incline bench pressing. It's a very functional movement that is great for overall power and development. Doing them in olylifting shoes is all the more fun!
Anyway, if you choose incline bench, do the first four sets of Monday's flat bench at 75-80% or so of the weight.
You should use a 5% jump on your triple on Friday. The following Monday, you hit that triple for five reps on your last set. I just increase everything 5% every week, unless I fail. If I fail, I'll simply try at it again once or twice, while bumping up diet, rest, and sex.
In workouts, you should increase the weight steadily to get to your top set. If your planning to use a working weight of 225 lbs. on squats for five reps, you'd do something like this:
135x5, 155x5, 175x5, 195x5, 225x5
That's just an example. The first four sets are more of a warmup than anything. They prep you for the fifth set. There's no set method of going about this. Just make steady incremental jumps in weight. Notice I went by 20 lbs. up to 195 lbs. After that, a 30 lb. jump to 225 after being warmed up shouldn't be a problem.
Also, the warmup weights go up as the working weight (final set) gets higher. If you eventually go from 225 to 270 lbs., you'd obviously spread the increments out to 30-35 lbs. or so, to accomodate. If you're pushing weights above 400 lbs., you can add in extra sets to work up to your working weight. This should go without saying, though.
As for where to start, if you have a max of 225, 5% of that is 10 lbs. or so. Obviously if you're using bigger weights, a 5% jump will be larger, so it could be 5 lbs. or it could be 10 lbs. I'd start at 200, for example. I'd make the jump from 200 to 210, to 220, to 225, then 235 and so on. I mean, it's an individual thing, really. Just try to keep it steady so you don't hit a wall quick. If you felt you had a difficult time the previous week, or on Friday's triple, don't make a 10 lb. jump, even if that does equate to 5% above your previous weight - use a 5 lb. jump!
Finally, if you choose high pulls, deadlifts, or military presses, just pick a weight that's below your 5 RM. There's no other lifts during the week to base these off of, so just take a shot in the dark (shouldn't be hard, after having done HST) and start somewhere below that. Work up each set as you would with other exercises.