Where can I find a list of (acceptable) 连读 words?
Some have been crystallized in the spelling:
- 别 &lt; 不要 (when used as a negative imperative)
- 甭 &lt; 不用 (it's even explicit in the character!)
- 啦 &lt; 了啊
- 这/那 as zhei/nei &lt; 这一/那一 (zhe yi / na yi)
There are probably others, plus all the Classical Chinese ones mentioned by Tang Ho.

When it comes to ones that have not been represented in writing:
- A very common one I can think of is 多少钱, in which 多少 easily becomes "duo'ao" (or more likely, "dwao").
- 这样子 is also commonly pronounced as "zhiangzi".
- 不要 is often "b'yao", which has a character 嫑 biao2 which I've absolutely never seen used

Some characters also suggest that the following contractions exist, although they seem to be dialectal and I've never seen/heard them used:
- 嘦 &lt; 只要 jiao4
- 覅 &lt; 勿要 fiao4
- 孬 &lt; 不要 nao1