This might just make you sweat more, but many men find that an undershirt (particularly under dress shirts) is a good option. This allows your outer shirt to stay dry, while the undershirt will catch the sweat. Make sure your overshirt is big enough that the sweat does not transfer from the inner to the outer shirt. Choose shirts that are cut lower under the armpits so that your skin and the shirt touch less. Different brands and cuts fit differently, so do some experimenting. These will cover the underarm area that you are worried about. Even though the extra layer might make you warmer, wear a lighter shirt underneath so that the combination of the two garments is not too hot. Tank tops and sleeveless clothing reduce the amount of fabric near the armpit that might get sweaty. Without that fabric, air also circulates in the armpit, cooling your skin and preventing as much sweat from forming.
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One-sentence summary -- Put on an undershirt. Find loose fitting clothes that allow your skin to breathe and air to circulate. Wear a jacket, cardigan, or shrug. Experiment with sleeveless shirts and dresses.

The bookcase will look more striking if the backdrop is darker than the surrounding walls and shelves. Consider painting the back of the bookshelves to create this vivid effect. For open-backed bookshelves, hang a cloth between them and the wall. Know what you'll be working with before you start filling the shelves. Vases, fancy tableware, figurines, trinkets, candlesticks your house is your oyster. Gather more things than you think you'll need, so you can test more options. Vertical, straight-lined objects look similar to the books. This creates an austere, rigid appearance. A few bowls, baskets, or other round objects lead to a friendlier atmosphere. Set aside the largest decorative objects, and oversize books if you have them. Space these out along the bookcase, leaving plenty of space between them to create separate focal points. A zig-zag pattern works well, placing these on the left end of the first shelf, then the right end of the second, then the left end of the third. Catch the eye for longer by varying the position of your books. Stack books on top of each other on some shelves, and vertically next to each other on others. Try a pyramid of books, topped with a small trinket. As you place your books, add a decorative object wherever it looks needed. Use colorful objects in contrast with drab book covers, or vice versa. A pair of tall candlesticks frames a row of short books nicely. Bookends come in handy and a variety of decorative shapes. Alternatively, you can use any heavy object to keep your books in place. Gaps often look better than a shelf clogged with paperbacks and origami. This is especially important for open-backed bookcases placed in the middle of a room, which need a large amount of space to let light through.
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One-sentence summary -- Create a dark backdrop (optional). Collect possible decorations. Start with the largest objects. Shelve books in different orientations. Use small decorations for contrast. Shore books up with heavy objects. Leave plenty of empty space.

One player lines up the cue ball behind the head string and aims at the rack. Knock the cue ball into the triangle of balls with force and precision. To execute a legal break shot, the breaker must either pocket a ball, or drive at least four numbered balls to the rail. When the breaker fails to execute a proper break, it is a foul. If the breaking player scratches on his or her shot, then the game has only partially begun. In the case of a foul, the incoming player has two options: accept the table as is and take the next shot, or re-rack the balls for a redo of the opening break. The incoming player gets to choose whether to personally break or to allow the original breaker to try again. If a player scratches on a legal break shot: All balls pocketed remain pocketed. The shot is a foul, meaning that it is now the other player's turn to shoot. The table is open, meaning that the first player to sink a ball without scratching chooses that ball type (stripes or solids) as his or her objective for the game. If a player jumps a numbered ball off the table on the break shot, it is a foul. The incoming player has two options: Accept the table in position. Take the next shot and continue the game. Take the cue ball in hand behind the head string. Shoot or break again, as necessary. If the 8-ball is pocketed on the break, then the breaker may ask for a re-rack, or have the 8-ball spotted and continue shooting. If the breaker scratches while pocketing the 8-ball on the break, the incoming player has the option of a re-rack or having the 8-ball spotted and begin shooting with ball in hand behind the head string. Before groups are chosen, the table is "open." The first player to sink a numbered ball effectively chooses to aim for that group of balls throughout the rest of the game. If you are the breaking player, for instance, and you sink the striped 13-ball, then you are "stripes." Look around for other striped balls that are easy to strike. Your goal is to pocket all of the striped balls (and then the 8-ball) before your opponent pockets all of the solid balls and the 8-ball. Make it clear who is who. If you make a stripe, call out, "I'm stripes!" If you make a solid, call out, "I'm solids!" If you are the first player to pocket a numbered ball, but you sink both a stripe and a solid at the same time: you have your pick between the two groups. Choose the group that looks the most immediately advantageous.
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One-sentence summary --
Break the rack. Know what to do in case of a scratch or foul. Choose groups.