Make hay while the sun shines
Definition 1 of 1
Pro Tip 1/3Opportunistic Timing
It implies acting quickly when you have a good chance, not waiting. 
He sold his stocks at a high price to make hay while the sun shines.
Pro Tip 2/3Positive Action
It encourages doing something beneficial, rather than being idle or procrastinating. 
I'll make hay while the sun shines by joining the extra class today.
Pro Tip 3/3Non-literal Sense
It's not about actual haymaking; it's about using a good situation to your advantage. 
Since she's offering help, make hay while the sun shines and ask for advice.