| Ponder |
| Imagine |
| Dream up |
| Think up |
| Envisage |
| Conceive |
| Theorize |
| Think __! |
| Fantasize |
| Prefigure |
| Brainstorm |
| Think (on) |
| Think about |
| Conceive of |
| Be creative |
| Form images |
| Preconceive |
| Get creative |
| Form notions |
| Form thoughts |
| Have thoughts |
| Form a notion |
| Form concepts |
| Conceptualize |
| Form a concept |
| Form a thought |
| Form an opinion |
| Create concepts |
| Fancy; conceive |
| Use your noggin |
| Think of ___ ... |
| Think creatively |
| Plan ahead, e.g. |
| Use one's noggin |
| Form in the mind |
| Conceive a notion |
| Conceive mentally |
| Make plans, maybe |
| Philosophize, say |
| Form a conception |
| Picture in the mind |
| Come up with a plan |
| Have thoughts about |
| Put some thought to |
| Form a mental image |
| Conjure up thoughts. |
| Cook up, so to speak |
| Picture in one's mind |
| Do some brainstorming |
| Come up with a concept |
| What an adman might do |
| Come up with something |
| Perform in a think tank |
| What an ad man might do |
| Engage in brainstorming |
| Put on one's thinking cap |
| Take part in a think tank |
| What to do in a think tank |