Join two simple sentences into a compound sentence:
Money can buy a bed. It cannot buy a good night's sleep.
Money can buy a bed, but it cannot buy a good night's sleep
OR
Remove the pronoun and make the direct objects the objects of the same verb:
Money can buy a bed but not a good night's sleep.
Use a semicolon in place of the comma and coordinating conjunction:
The happiest people do not have the best of everything. They make the best of everything they have.
The happiest people do not have the best of everything; they make the best of everything they have.
Use a semicolon with a conjunctive adverb to show the relationship between the two sentences:
His jeans were three sizes too big. They fell down when he tried to run away.
His jeans were three sizes too big; consequently, they fell down when he tried to run away.
Use a subordinating conjunction between the sentences:
I'm not going to the theater tonight. I have a splitting headache.
I'm not going to the theater tonight because I have a splitting headache.
OR
Reverse the sentence:
Because I have a splitting headache, I'm not going to the theater tonight.
Change one sentence into a participial phrase:
I heard the church bells. They pealed throughout the village.
I heard the church bells pealing throughout the village.
Change one sentence into a relative clause or an appositive:
My mother was well-known in our community. She often coordinated social events.
My mother, who was well-known in our community, often coordinated social events.
My mother, well-known in our community, often coordinated social events.
Integrate minor details:
My nephew is three years old. He is the most hyperactive child I have ever met.
My three-year-old nephew is the most hyperactive child I have ever met.