Here are my tuning tips.
Use a Neary (chk spelling) Drum Torque - a very simple torque dial.
Get some new heads. I find thicker, coated heads are easier to tune and stay in tune longer. If you can't afford tops and bottoms get just the tops and put the best of the old heads on the bottoms.
When you have removed the old heads do the following. Check the bearing edges for any flaws (dips, nicks, splits, protrusions). LIGHTLY sand the bearing edges and wipe clean. Clean the rods especialy the threads (if they are rusty-replace). Clean the rims looking for any problems (bent, debris, rust, bumps). WD40 cleans rims well just make sure you wipe it off.
Get some Radio Shack teflon lubricant (small needle nosed tube) and a small hard wax candle (any). As you assemble the heads FIRST run the candle oround the bearing edge (this will make a smoother surface). Seat the head, then put on the rim. As you put in each rod put a drop of the lubricant on the end of the threads and a little over and under the rod washer. Put on all rods just finger tight.
Now you use
the drum torque. Using an alternating patern (as usual) tighten the rods slowly to a setting of 4-5. Then go around again increasing to 6-8. Now, depending on what sound you want you can continue in small steps up to 10, 12 or whatever (you may have to experiment on one drum to get the tension or tone you want ie:stick response or note tuning). You can tune them all the same setting or different, you can even de-tune one rod. Remember you must allow for stretch and retune about a week later-WRITE DOWN THE SETTINGS WHEN YOU GET IT RIGHT!
The drum torque is a very low tech product but by using the wax on the bearing edges and the lube (which is great for your whole kit as it does not drip-one tube should last like a year) you lessen the friction of the rods and make the readings as consistant as possible. The wax fills in the bearing egde making it a smoother fit to the head. If you need to retune just undo the rods and work your way back up to your settings (you did write them down).
My sets stay in tune for months. I used to tune them to major thirds (like chords) but I've found a tension of 10-12 for all drums gives a natural relationship between drums that I like.
Bob