Which is more effective in sales: to focus on small or big opportunities?

Sales opportunities available are time bound irrespective of whether small OR big.
Sharpen your skill sets to grab such opportunities as they cannot wait for unlimited period.

I think U have to start with small one till U have the capabilities for the big

I think to be efficient u should take the small ones and to be more effective take the big ones , that if u are willing to enhance sales progress ,, at the end it is really depends on firms strategic plans in sales .

The cost of sales acquisition, be it BIG or SMALL opportunities always remains the same ! So, to keep a high RoI it is advisable to work more closely on bigger opportunities theoretically.
Nevertheless, as a wise and smart manager, it is always advisable to maintain the sales funnel with a mix of both BIG and SMALL opportunities as the sales cycle does play a very essential role in focusing on closures to fulfill targets on a given deadline.
Big opportunities do definitely have a longer sales cycle hence over a longer period it is the BIG opportunties which fetch in more revenues and healthier bottom-lines.
However, to keep sales flowing in, a sales funnel should contain small opportunities as well.
After all, every small opportunities also has the potential of growing big.
Thats where a wise sales person's role and capabilties differentiate him/her from an average sales person.

First and foremost, we have to assess our capabilities, and to identify the strengths and weaknesses we have, the work on any project is a boxing match, and the project is the opponent and we always have to win, it is foolish to choose an opponent stronger than us, many times the defeat means the destruction of the institution and out of the market.

i believe as a great sales rep you should always hold your standards high, claim it and it shall be yours!!!

that is a good open and general question , I liked it. 

I think focus on Opportunities whatever Big or Small, is the most important, the word FOCUS on Opportunity . 

but classifying if it is towards getting Big or Small one, maybe depends on the capabilities of the organisation, Team, Sales person, and Funds /or in other Words COST OF Sales. 

as what could be the point focus on Big Op. while Profitability could be Minimal. 

anyway the Most important is Focus , Sell Sell, Sell . 

 

It's depend on company strategy and targeting , in targeting we can choose what we want to do in market ,