Keep tabs on | :   | Watch | |
Let's just play it by ear | :   | Improvise | |
Baker's dozen | :   | 13 | |
Can't see the forest for the trees | :   | Lost in the details | |
Hurdles | :   | Obstacles | |
Wolf in sheep's clothing | :   | Not what (s)he/it seems to be | |
A stone's throw away | :   | Not far | |
Learning curve | :   | Time/Efficiency | |
Seasoned veteran | :   | Experienced | |
Spring chicken | :   | Young | |
Wasn't born yesterday | :   | Seen this before | |
Level playing field | :   | Fair | |