I'll add a few ideas to Chew's excellent review:
[sgf-full](;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[0.50]TM[1800]OT[5x10 byo-yomi]PW[SBJS2000]PB[S1NK]WR[12k]BR[13k]DT[2010-11-07]PC[The KGS Go Server at
http://www.gokgs.com/]RE[W+Resign];B[pd]BL[1796.663];W[dq]WL[1793.175];B[pq]BL[1793.568];W[cd]WL[1789.757];B[qo]BL[1790.943];W[fc]WL[1783.976];B[co]BL[1787.742];W[gq]WL[1777.463];B[jq]BL[1778.88]C[Marcus: I'm not as worried about your C5 stone. I think this is an excellent move. White's G3 move was very passive. It's too far away from C5 to really cause you any issues, in my opinion. See variation on next move.]
(;W[mq]WL[1766.751]
(;B[lp]BL[1771.453]C[Marcus: I don't like this. The proverb says not to touch weak stones. Chew's suggestion of the one point jump to K5 is a good one, I think.];W[np]WL[1763.63];B[mp]BL[1730.949];W[no]WL[1756.782];B[nq]BL[1721.833];W[oq]WL[1747.591];B[nr]BL[1720.015];W[pp]WL[1744.122];B[or]BL[1701.779];W[oo]WL[1726.689];B[qp]BL[1695.637];W[po]WL[1719.169];B[qn]BL[1683.382];W[om]WL[1710.801]
(;B[qk]BL[1641.386]TR[pd]C[Marcus: I think this move is too local. It's too far to be a long extension from Q16, it strengthens your already-strong lower right group, and it doesn't play towards the center.
See variations.];W[kl]WL[1697.954];B[jc]BL[1619.184];W[qg]WL[1687.934];B[qe]BL[1600.305];W[qj]WL[1683.732];B[pj]BL[1595.906];W[qi]WL[1681.272];B[pk]BL[1576.481];W[oh]WL[1677.29];B[md]BL[1493.391];W[ln]WL[1658.804];B[ed]BL[1478.138];W[ec]WL[1655.8];B[dd]BL[1469.326];W[dc]WL[1652.965];B[dg]BL[1465.848];W[ci]WL[1641.165];B[ck]BL[1454.739];W[cg]WL[1634.611];B[ch]BL[1444.953];W[dh]WL[1629.39];B[bh]BL[1441.891];W[df]WL[1626.118];B[eg]BL[1439.979];W[cf]WL[1615.753];B[ef]BL[1424.383];W[ee]WL[1598.989];B[de]BL[1420.552];W[fe]WL[1595.569];B[ce]BL[1417.902];W[be]WL[1590.381];B[bf]BL[1403.917];W[fd]WL[1587.311];B[di]BL[1398.469]C[Not a bad sequence. I won't add to Chew's already detailed points here.];W[nc]WL[1558.185];B[mc]BL[1383.84];W[qc]WL[1552.305];B[pc]BL[1381.068];W[od]WL[1539.421];B[oe]BL[1376.794];W[pb]WL[1525.999];B[oc]BL[1371.23];W[ob]WL[1521.697];B[nb]BL[1366.288];W[qd]WL[1517.827];B[nd]BL[1362.927];W[rb]WL[1511.854];B[rd]BL[1353.74];W[rc]WL[1506.193];B[re]BL[1336.818];W[pf]WL[1497.263];B[pe]BL[1329.089];W[qf]WL[1478.123]
(;B[of]BL[1321.198]C[Marcus: Seems small ...];W[og]WL[1475.653];B[mf]BL[1315.429];W[mh]WL[1465.742];B[mj]BL[1274.836];W[eh]WL[1459.366];B[gg]BL[1261.621];W[fg]WL[1455.394];B[ff]BL[1258.474];W[gf]WL[1453.668];B[hr]BL[1167.458];W[gr]WL[1449.646];B[hq]BL[1156.278];W[kp]WL[1434.411];B[kq]BL[1152.716];W[ko]WL[1429.913];B[gp]BL[1145.128];W[fp]WL[1427.191];B[go]BL[1142.873];W[kj]WL[1416.725];B[li]BL[1136.446];W[lh]WL[1407.636];B[ki]BL[1131.833];W[ji]WL[1402.925];B[kh]BL[1130.001];W[kg]WL[1395.882];B[jh]BL[1128.588];W[hg]WL[1382.732];B[gh]BL[1121.167];W[hh]WL[1378.324];B[gi]BL[1117.996];W[hi]WL[1375.828];B[ii]BL[1116.466];W[jj]WL[1370.561];B[hj]BL[1104.821];W[ij]WL[1367.993];B[ih]BL[1094.739];W[gj]WL[1361.853];B[ig]BL[1088.343];W[hf]WL[1355.798];B[fi]BL[1077.719];W[ei]WL[1351.396];B[fj]BL[1062.249];W[gk]WL[1345.137];B[dj]BL[1046.492];W[ej]WL[1340.799];B[fk]BL[1042.743];W[dk]WL[1323.025];B[cj]BL[1027.343];W[fl]WL[1312.763];B[ek]BL[1014.123];W[dl]WL[1308.701]
(;B[el]BL[1009.1]C[Marcus: I'm sure you've already looked at this, but G8 first looks promising.];W[em]WL[1305.601];B[gl]BL[1006.412]C[SBJS2000 [12k\]: thanks
])
(;B[gl]
(;W[el];B[hk])
(;W[hk];B[el];W[fm];B[em])))
(;B[mj]C[Marcus: Here's that splitting attack Chew was talking about.]))
(;B[cj]C[Marcus: I'm not really sure about how good this move is, so it might not be a good idea to listen to my advice on this one.

However, it's at a critical point, restricting any extension from the shimari. C10 also makes it difficult for White to gain much from attacking the C5 stone. I'll show a few variations.
As a side note, this is probably the move I'd make on this board. I'm crazy like that.]
(;W[ch]
;B[ej]C[This, while still invadable, really breaks up the left side.])
(;W[cm];B[cg]
;W[do]TR[bd]C[Marcus: Your R13 group has a base, and gives you the later option of probing at B16. The C5 stone still has some aji, even though White has played 3 moves against it.]))
(;B[fp]C[Marcus: This is another possible continuation for you to try. Remeber, though, that the left side is going to be important.];W[fq]
(;B[dk]C[Marcus: Apparently, this is one possible continuation, but not often played at all.])
(;B[cq];W[cr];B[dp];W[eq];B[bq]
;W[cl]C[Marcus: C5 is strong, and C8 is too far from C16 to be considered an extension. Easily invadeable, if needed.]))
(;B[jd]C[Marcus: This is another big point, though the top is uninteresting, as there are fewer points to be gained.]))
(;B[jo]TR[mq]C[N3 is a weak stone for you to attack, and the G5 group is low and easily contained.]))
(;W[cm]C[Even if your opponent plays a tight pincer ...];B[fp];W[fq];B[cq];W[cr];B[dp];W[eq]
;B[bq]C[Something like this keeps C5 fairly strong.]))[/sgf-full]