It is very important to always put your wig on using the back or the ear tabs on each side.
Many people out of habit will put their wig on or even adjust throughout the day using the front lace itself.
You NEVER want to pull on the lace front, as tugging on the lace will lead to tearing or fraying.
Usually a sign of this is lace that has started to unravel in mainly one spot, and is about the size of the tip of your finger.
Be careful to avoid using conditioner on your lace front.
Conditioner is meant to de-tangle, and will loosen the hand knotting, which can cause strands to eventually shed from your lace front.
Also, take care not to brush too hard near the lace.
This is where proper sizing is so important.
If the wig is too tight or big it will shift throughout the day.
Constant movement will contribute to rubbing and friction.
A lace front glue or tape will help keep your lace front in place. 
We love It Stays as it keeps the wig secure, and is removable with water 
Majority of the lace fronts we carry come pre-cut.
However, if you would like to cut your lace front further, or if you would like to cut a section that has started to fray you should always use a Pinking Shear.
Makeup such as foundation or powder can really help blend the lace in with your skin tone.
This also gives your front hairline a softer finish.
If it is an option, you can pull your own hair forward to blend, or can cut a few strands shorter along your hairline to give that natural "baby hair" effect.
(Just make sure to have a professional help with any altering, or experiment on an older style first).