Very sharp, lipped brad-points and a backer board tight to the surface where the drill will exit from the workpiece.
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The most expensive tool is the one you buy "cheaply" and often...
Drilling holes at a set speed regardless of the bit size or material type is one of the more often seen mistakes. Your small holes can all be drilled at a fairly fast speed. Too slow will increase the raggedness of smaller holes. For you exit wounds, as mentioned, a well clamped backer board will assure a clean exit. Although they may be overkill for this project I run lipped brad point bits for my furniture work. Nice clean holes.
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