Day to Day Cue Maintenance
Always keep your cue in a good quality hard case , when not in use do not leave the cue leaning up against a wall or in a corner.
Do not store your cue and case too near to a heat source (radiator etc)
Do not leave your cue in a car boot for long periods of time as rapid temperature fluctuations and humidity changes are bad for the cue and can in extreme cases cause warping.
 
Cleaning Your Cue:  (One Damp Cloth / One Dry Cloth)
When playing and your cue becomes too sticky on your bridge hand, wipe it down with a wrung out damp cloth and then immediately dry off with a dry cloth. (all the top professionals use this cleaning technique)
Be careful not to wet the tip.

Never ever use sandpaper on the cue, this will remove the protective sealer on the shaft leaving bare wood and it will also gradually wear down the shaft.
 
Brass Joints:
Occasionally clean the brass faces of the joint with a dry cloth. Dirt on the faces of the joint can effect the contact when striking the cue ball and can cause a tinny noise to occur on the odd occasion. You should never oil or grease the joint.

Retipping your own cue:  Steps 1 to 10
1. Cut off old tip. (use a craft knife / blade)

2. Clean off old glue and remains of old tip. ( scrape until clean with a craft knife / blade, never use sandpaper on the ferrule)

3. Make sure that the top of the ferrule is perfectly clean and flush.

4. Flatten the back of the new tip with a fine abrasive sandpaper, always use a level surface.

5. Apply one small drop of glue to the top of ferrule. If possible use a 2-part epoxy resin glue such as Araldite or if in a hurry Superglue gel) Be very careful if using normal superglue, do not to let it drip onto the shaft.
6. Place the tip onto the glue / ferrule and centre up. Press down firmly. Wipe off any excess glue then release pressure. For best results leave overnight for glue to dry properly.
7. Turn cue upside down on cutting board and trim off excess tip to size of ferrule.
8. With a flat low to medium type file / file sander, file the tip to a rough dome shape, only file from the centre of the tip outwards.
9. With fine abrasive paper smooth sidewall of tip into ferrule, making sure not to touch the wood of the shaft below the ferrule.
10. Finish off shaping to a dome shape with a tip shaper or sandpaper.