Lots of tips abound, but lets focus on the little things. As you know walleye/sauger fishing success is in the details. Different changes like cadence, size, speed, seasonal movements, bait patterns, low vs high water conditions and low vs high sky conditions all play a part in how these fish will react.

• Keep hooks sharp. Especially after working out of a snag.
• Wash those hands.  Scent is a killer. I  play it safe by washing my hands with deer scent killer bio degradable soap.
• Keep the line tight.  When jigging, especially verticle jigging, a tight line helps tremendously.  With every change in feeling, set the hook.
• Use quality gear.  Now is not the time to play it cheap. A  high quality IM7 or IM8 rod in 6' to 6'3 is ideal for jigging. Be sure to have an extra fast tip and medium action. My Mr Walleye Gary Roach Rods and St Croix Avids are a couple of the best.
• Use lively bait.  Minnows, leeches and crawlers not lookin their best have a tough time attractin some the fish.
• To give the minnows an extra "kick", drop a couple of capfuls of hydrogen peroxide.  Gives them a nice "boost".
• Be sure to keep the line knot at a 90 degree angle when verticle jigging. Always check after a fish, snag or miss.  Thats the 12 o'clock position. When pitching jigs, keep the knot at 9 o'clock position. 
• When trolling on sunny days, try and use baits that are colorful, such as Reef Runners, Rapalas, or Wally Divers. The brighter color will reflect a lot of light, and could trigger a strike.
• On cloudy or overcast days, use baits that resemble the natural forage of the lake such as perch colored baits, baby bass baits, or baits that resemble gizzard shad. 95% of a walleyes diet is perch shad, so try to match the hatch. One of my favorites is using a #5 Wally Diver/Shad Rap in perch pattern, about 4-7 feet down on an overcast day.
• When trolling crawler harnesses blades such as NO. 5 or NO. 7 in colors of brass, firetiger, silver or nickel work well.
  
  

Coots Lures has some of the most aggressive looking, and sounding, crawler harnesses components you can find. All high quality products, with rattles available. I especially like the rattlin crawler  harness.

Gamma Techologies produces a slick fluorcarbon leader  product that is excellent for crawlers harnesses.  Not the brittle products of yesterday, this leader holds up to the biggest fish in the toughest conditions, especially like zebra mussels on the great lakes.

Hutch's Tackle and Guide Service    

Hutchie makes one fine jig.  The live bait and glitter jigs are my go to presentations when fishing vertically in the Mississippi and Illinois Rivers.  He also paints one heckuva of a custom color for your cranks.

Jigging

Work the back side of reefs when pitching jigs as this is where the aggressive feeders are congregating.

Cranking

Be sure to run one crank high the in the water column.  These fish usually dont show up on the electronics.

Rigging/Harnesses

Harnesses are very successful once the spawn is over and the water warms up a bit.  I tie mine with Gamma Flourcarbon Leader.  Super strong and stands up to those nasty zebra mussels on Green Bay.  Favoritle colors purple and silver beads.

Verticle Jigging

Very the cadence.  Instead of up/down, pop the jig 3x off the bottom and hold for a 3 count. Usually the fish hits on the fall.

Walleyes are samplers and saugers are eaters.  Walleyes will sample a bait and spit it out in record time.  Sauger slam the bait when they are aggressive.