context: How to dissolve gallstones
Consider oral dissolution therapy.
Your doctor may prescribe a course of ursodiol to dissolve your gallstones without surgery. These treatments are essentially bile acids in pill form.
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next sentence for the context: Ursodiol, in particular, is a popular treatment because it is one of the safest common drugs available. Oral dissolution therapy is most likely to be successful in treating small stones (less than 1.5 centimeters in diameter) with high cholesterol content.

context: How to rebuild an engine
Thoroughly clean the engine before beginning if possible.
Accumulated dirt, grime, and grease will make removing bolts and disconnecting components a messy job.
Position the vehicle near your hoist.
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next sentence for the context: You'll need to be able to work on an even and well-lit surface, with enough room to position your hoist and maneuver around. If you've got a big enough garage, all the better.

context: How to fix a squeaking ceiling fan
Turn the ceiling fan off, and allow the blades to coast to a complete stop.
Grasp each blade and wiggle them to see if any of the fasteners (usually phillips type screws) are loose, and if so, tighten them.
It is unusual for loose blades to cause a squeak, but possible in some instances.
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next sentence for the context: Also check that the light bulbs are securely in place; they can rattle around in their sockets. Look for excess dust accumulated on the blade surface, especially the top.

context: How to pick your teeth without a toothpick
Use some floss.
The absolutely ideal thing to use to tackle anything stuck between your teeth is some dental floss. If you have some handy, or keep some in your desk drawer at work, this is your best choice.
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next sentence for the context:
This is the safest and most effective way to clean out food from between your teeth. Break off a length of floss that is about a foot long.